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1. Towards Automatic Generation of Patient-Specific Knee Models

Author

Elaheh Elyasi, Marek Bucki, Boubaker Asaadi, Daniel Elizondo, and Antoine Perrier

Abstract

The objective of the current paper is to present a pipeline designed to reduce the pre-processing time required to build subject-specific finite element knee models and facilitate their clinical integration. The pipeline involves development and validation of an atlas model of the knee joint and features of the TwInsight software suit that use novel methodologies such as: 1) deep learning for automatic segmentation of the bones from computed tomography scans, 2) automatic generation of finite element meshes with hexahedral elements, and 3) anatomical inference algorithm to adapt the atlas model to the morphology of a subject and result in the subject’s personalized biomechanical model.

Published
2022

5. Biomechanical monitoring and machine learning for the detection of lying postures

Author

Peter Worsley, Silvia Caggiari, Marek Bucki, Yohan Payan, Dan L. Bader, University of Southampton, Ingénierie Biomédicale et Mécanique des Matériaux (TIMC-IMAG-BioMMat), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Gestes Médico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), S.A.S. Texisense, entreprise, and ANR-19-P3IA-0003,MIAI,MIAI @ Grenoble Alpes(2019)

Subjects
Male, Computer science, Movement, Posture, Biophysics, FOS: Physical sciences, Machine learning, computer.software_genre, Signal, Continuous pressure monitoring, 03 medical and health sciences, 0302 clinical medicine, medicine, Range (statistics), Humans, Orthopedics and Sports Medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Mechanical Phenomena, Postures detection 31 32, business.industry, Actimetry systems, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Monitoring system, Bayes Theorem, 030229 sport sciences, Physics - Medical Physics, Sagittal plane, Biomechanical Phenomena, Support vector machine, medicine.anatomical_structure, Postures detection, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Medical Physics (physics.med-ph), Artificial intelligence, Support surface, business, Lying, computer, 030217 neurology & neurosurgery, Test data
Abstract

Background: pressure mapping technology has been adapted to monitor over prolonged periods to evaluate pressure ulcer risk in individuals during extended lying postures. However, temporal pressure distribution signals are not currently used to identify posture or mobility. The present study was designed to examine the potential of an automated approach for the detection of a range of staticlying postures and corresponding transitions between postures.Methods: healthy subjects (n=19) adopted a range of sagittal and lateral lying postures. Parameters reflecting both the interactions at the support surface and body movements were continuously monitored. Subsequently, the derivative of each signal was examined to identify transitions between postures. Three machine learning algorithms, namely Naïve-Bayes, k-Nearest Neighbors and Support Vector Machine classifiers, were assessed to predict a range of static postures, established with a training model (n=9) and validated with new input from test data (n=10). Findings: results showed that the derivative signals provided a means to detect transitions between postures, with actimetry providing the most distinct signal perturbations. The accuracy in predicting the range of postures from new test data ranged between 82%-100%, 70%-98% and 69%-100% for Naïve-Bayes, k-Nearest Neighbors and Support Vector Machine classifiers, respectively.Interpretation: the present study demonstrated that detection of both static postures and their corresponding transitions was achieved by combining machine learning algorithms with robust parameters from two monitoring systems. This approach has the potential to provide reliable indicators of posture and mobility, to support personalized pressure ulcer prevention strategies.

Published
2020

6. Real-time computer modeling in prevention of foot pressure ulcer using patient-specific finite element model and model order reduction techniques

Author

Yohan Payan, Siamak Niroomandi, Antoine Perrier, Marek Bucki, Gestes Médico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), TexiSense, Ingénierie Biomédicale et Mécanique des Matériaux (TIMC-IMAG-BioMMat), and Amit Gefen

Subjects
finite element model, Model order reduction, Point (typography), Computer science, 0206 medical engineering, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], smart sockfoot, 02 engineering and technology, 020601 biomedical engineering, Finite element method, 3. Good health, Pressure ulcer prevention, 03 medical and health sciences, 0302 clinical medicine, Approximation error, Control theory, Norm (mathematics), reduced order model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot pressure, 030217 neurology & neurosurgery, Foot (unit), Interpolation
Abstract

International audience; Foot ulcers are usually the consequence of a trauma associated to diabetes that could lead to amputation and shorten life expectancy. In this chapter some technologies that could prevent pressure foot ulcers for diabetic persons are presented. There are three essential components: 1) a smart sock to monitor the pressure applied to the foot, 2) a patient-specific finite element model of the foot that includes the soft tissues and bony prominences to compute the required indicators like stress and strain in the foot and 3) a reduced order model that is able to compute the results of the finite element model in real-time and with a small error. To create the reduced order model Proper Orthogonal Decomposition with Interpolation (PODI) was employed. The displacements in the foot based on the reduced order model were computed in 0.1s; although the relative error norm was 2.6% which seems acceptable from a clinical point of view

Published
2020

7. A novel approach to identify individual positioning in a range of supine postures

Author

Silvia Caggiari, Peter Worsley, Yohan PAYAN, Marek Bucki, Dan Bader, University of Southampton, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), S.A.S. Texisense, entreprise, and Payan, Yohan

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
Abstract

International audience; INTRODUCTION: Pressure mapping provides visual feedback of the interface pressures between vulnerable tissues and supporting surfaces. However, the short-term nature of these measures provides limited insight into the temporal changes in pressure during evoked or self-induced movements. We examined the performance of selected parameters derived from continuous pressure monitoring and actimetry to detect postural changes. This yielded large data sets, which would benefit from intelligent data processing. This motivates the present study, which examines the accuracy of machine learning for the prediction of supine postures.METHODS: Nineteen healthy participants adopted supine postures on a standard mattress, movements were evoked using the head of bed (HOB) angle and a tilting system to achieve sagittal (HOB between 0 and 60o) and lateral (left and right) postures, respectively. A series of time-related biomechanical parameters were estimated using a pressure monitor and actimetry placed on the sternum. Two supervised machine learning algorithms were assessed, namely K-nearest neighbors (KNN) and Naïve-Bayes (NB), established with training data (n=9) and cross-validated with test data (n=10). KNN estimates the distance between a test data point and the nearest data point in the training phase, and NB the probability that a test data point belongs to specific cluster of postures.RESULTS: Ranking of the biomechanical parameters revealed whole body contact area (>20mmHg) and trunk tilt angles provided the highest discrimination for postural changes. Separate clusters were identified for postures incorporating 20oHOB increments. The accuracy in predicting the range of sagittal and lateral postures was >80% for all subjects, for NB approach. By contrast, KNN accuracy resulted >70% for 8/10 subjects. An exemplar of both results are presented for one participant (Figure2). The NB algorithm was probably able to accommodate part of the non-linearity in the data, which could explain the differences in accuracy.CONCLUSIONS: Accurate prediction of supine postures was achieved by combining machine-learning approaches with robust parameters estimated from two monitoring systems. This approach represents an advanced method of monitoring postures and mobility. Future work will combined evaluation of the local physiological response to these postures in order to create intelligent monitoring solutions. These technologies have the potential to identify pressure ulcer risk and efficient strategies for prevention in practice.

Published
2019

8. Clinical workflow for personalized foot pressure ulcer prevention

Author

E Champion, Bruno Diot, Vincent Luboz, Nicolas Vuillerme, Marek Bucki, Antoine Perrier, Yohan Payan, S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Informatique de Sécurité (IDS S.A.)

Subjects
Male, Patient-Specific Modeling, 0206 medical engineering, Biomedical Engineering, Biophysics, 02 engineering and technology, Risk Assessment, 03 medical and health sciences, 0302 clinical medicine, Image Processing, Computer-Assisted, Humans, Medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot pressure, Aged, Pressure Ulcer, Orthodontics, Foot, business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Soft tissue, Anatomy, Middle Aged, Patient specific, 020601 biomedical engineering, Biomechanical Phenomena, 3. Good health, Tomography x ray computed, Pressure load, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Biomechanical model, Stress, Mechanical, Tomography, X-Ray Computed, business, 030217 neurology & neurosurgery
Abstract

International audience; Foot pressure ulcers are a common complication of diabetes because of patient’s lack of sensitivity due to neuropathy. Deep pressure ulcers appear internally when pressures applied on the foot create high internal strains nearby bony structures. Monitoring tissue strains in persons with diabetes is therefore important for an efficient prevention. We propose to use personalized biomechanical foot models to assess strains within the foot and to determine the risk of ulcer formation. Our workflow generates a foot model adapted to a patient’s morphology by deforming an atlas model to conform it to the contours of segmented medical images of the patient’s foot. Our biomechanical model is composed of rigid bodies for the bones, joined by ligaments and muscles, and a Finite Element mesh representing the soft tissues. Using our registration algorithm to conform three datasets, three new patient models were created. After applying a pressure load below these foot models, the Von Mises equivalent strains and “cluster volumes” (i.e. volumes of contiguous elements with strains above a given threshold) were measured within eight functionally meaningful foot regions. The results show the variability of both location and strain values among the three considered patients. This study also confirms that the anatomy of the foot has an influence on the risk of pressure ulcer.

Published
2016

9. A patient-specific 3D musculo-skeletal finite element model of ankle arthrodesis

Author

Siamak Niroomandi, Antoine Perrier, Marek Bucki, Yohan PAYAN, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Payan, Yohan

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, Musculo-skeletal model, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Ankle Arthrodesis, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Patient-specific, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, Finite Element, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
Abstract

International audience; In the context of advanced ankle arthrosis, arthrodesis is a popular surgery option. After arthrodesis the motion of other ankle joints can be modified under muscle activation and this modification was investigated in this study. Apart from that, the muscle functions may vary as a result of the constrained ankle. In this study a combination of Finite Element (FE) and rigid body was used to model the foot taking into account contact and muscle activation. To simulate such complex model, the ArtiSynth platform (artisynth.org) was used thus providing powerful tools to efficiently combine rigid body and soft tissue. A high-resolution CT volume acquired on the unloaded right foot of a volunteer was used to segment the 30 bones and reconstruct their 3D shapes. Rigid body contact constraints were implemented in the Artisynth framework to model joint interactions. All 33 joint motions were further constrained by 210 ligaments modeled by cables and inserted on the bones using CT images of the subject. Such contacts between bones and ligaments attached to the bones were thus used guiding the foot kinematics. The Aponeurosis was modeled using five ligaments linked by transverse structures. Finally, 15 Hill's model muscles were positioned according to their anatomical course and can be independently activated. Soft tissues were modeled by a FE mesh comprising three sub-domains representing skin, fat and muscles tissues. Neo-Hookean material model was used to account for large deformations and all the modeled elements are subject to gravity. This generic model of the whole foot allows simulating a virtual arthrodesis and predicting the post-operative foot kinematics. Since the computation time for running such complex model is still very high, we are currently implementing model order reduction techniques to decrease such computation time to make the simulations compatible with clinical routine.

Published
2018

10. Quantifying discretization errors for soft-tissue simulation in computer assisted surgery: a preliminary study

Author

Huu Phuoc Bui, Marek Bucki, Stéphane Bordas, Satyendra Tomar, Michel Duprez, Vanessa Lleras, Franz Chouly, Pierre-Yves Rohan, Claudio Lobos, Alexei Lozinski, Institut de Mathématiques de Marseille (I2M), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Université du Luxembourg (Uni.lu), S.A.S. Texisense, entreprise, Laboratoire de Mathématiques de Besançon (UMR 6623) (LMB), Université de Bourgogne (UB)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Institut de Mathématiques de Bourgogne [Dijon] (IMB), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Bourgogne (UB), Institut Montpelliérain Alexander Grothendieck (IMAG), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Universidad Tecnica Federico Santa Maria [Valparaiso] (UTFSM), Arts et Métiers ParisTech, HESAM Université (HESAM), University of Luxembourg [Luxembourg], Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)

Subjects
FOS: Computer and information sciences, Mathematical optimization, Discretization, Computer science, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, 02 engineering and technology, 01 natural sciences, Computational Engineering, Finance, and Science (cs.CE), 0203 mechanical engineering, 0103 physical sciences, adaptive finite elements, Computer Science - Computational Engineering, Finance, and Science, 010301 acoustics, Discretization of continuous features, computational biomechanics, Applied Mathematics, Numerical analysis, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Finite element method, 3. Good health, Method of mean weighted residuals, 020303 mechanical engineering & transports, Mesh generation, computer assisted surgery, Modeling and Simulation, Analyse numérique [Mathématique], A priori and a posteriori, goal oriented error estimates, Focus (optics), Algorithm, [MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA]
Abstract

Errors in biomechanics simulations arise from modeling and discretization. Modeling errors are due to the choice of the mathematical model whilst discretization errors measure the impact of the choice of the numerical method on the accuracy of the approximated solution to this specific mathematical model. A major source of discretization errors is mesh generation from medical images, that remains one of the major bottlenecks in the development of reliable, accurate, automatic and efficient personalized, clinically-relevant Finite Element (FE) models in biomechanics. The impact of mesh quality and density on the accuracy of the FE solution can be quantified with \emph{a posteriori} error estimates. Yet, to our knowledge, the relevance of such error estimates for practical biomechanics problems has seldom been addressed, see [25]. In this contribution, we propose an implementation of some a posteriori error estimates to quantify the discretization errors and to optimize the mesh. More precisely, we focus on error estimation for a user-defined quantity of interest with the Dual Weighted Residual (DWR) technique. We test its applicability and relevance in two situations, corresponding to computations for a tongue and an artery, using a simplified setting, i.e., plane linearized elasticity with contractility of the soft-tissue modeled as a pre-stress. Our results demonstrate the feasibility of such methodology to estimate the actual solution errors and to reduce them economically through mesh refinement., Comment: 35 pages, 10 figures

Published
2018
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11. Prévention et innovation technologiques : autour de l'escarre et du mouvement

Author

Antoine Perrier, Marek Bucki, Yohan PAYAN, Payan, Yohan, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), S.A.S. Texisense, and entreprise

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
Abstract

Numéro spécial Conférence annuelle de la Société Française de l'Escarre 2018; International audience

Published
2018

12. Biomechanical modeling of the diabetic foot ulcer risk to guide surgery

Author

L. Gatin, A Geffrier, Antoine Perrier, Marek Bucki, P Denormandie, Yohan Payan, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Ingénierie Biomédicale et Mécanique des Matériaux (TIMC-IMAG-BioMMat), Hôpital Raymond Poincaré [AP-HP], and TexiSense

Subjects
medicine.medical_specialty, Knee biomechanics, 0206 medical engineering, Biomedical Engineering, multi-rigid bodies, Bioengineering, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, 02 engineering and technology, surgery, 03 medical and health sciences, 3D Muscle activation, 0302 clinical medicine, Diabetes mellitus, Medicine, ComputingMilieux_MISCELLANEOUS, diabetes, Foot, business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Soft tissue, finite element modeling, General Medicine, medicine.disease, 020601 biomedical engineering, Computer Science Applications, Surgery, Musculoskeletal Modeling, Human-Computer Interaction, Diabetic foot ulcer, [SDV.IB]Life Sciences [q-bio]/Bioengineering, soft tissue, business, 030217 neurology & neurosurgery, Foot (unit)
Abstract

International audience

Published
2019

13. Contributors

Author

Clayton Adam, Davide Ambrosi, Peter Anderson, Stéphane Avril, Thiranja P. Babarenda Gamage, Pierre Badel, Chiara Bellini, Silvia S. Blemker, Mohamed Bader Boubaker, Peter H.M. Bovendeerd, Marek Bucki, Begonã Calvo, Francis Cannard, Matthieu Chabanas, Grégory Chagnon, Simon Chatelin, Hadrien Courtecuisse, Nicolas Curt, Christian J. Cyron, Tammo Delhaas, Hervé Delingette, Elena S. Di Martino, Raphaël Dumas, Olivier Dupuis, Denis Favier, Sidney Fels, Behrooz Fereidoonnezhad, Gérard Finet, Cormac Flynn, Fanny Frauziols, Jean-François Ganghoffer, Alberto Garcia, Thomas C. Gasser, Ahmed M. Gharib, Paul Glass, Hans Gregersen, Negar M. Harandi, Nicolas Hermant, Belén Hernández-Gascón, Andrew Ho, Gerhard A. Holzapfel, Jay D. Humphrey, Yoann Lafon, Sébastien Laporte, Donghua Liao, Vincent Luboz, Mauro Malvè, Stéphanie Marchesseau, Jean-Louis Martiel, Scott Moisik, Jérôme Molimard, Fanny Morin, Martyn P. Nash, Laurent Navarro, Mohammad Ali Nazari, Poul M.F. Nielsen, Jacques Ohayon, Cees W.J. Oomens, Yohan Payan, Estefanía Peña, Pascal Perrier, Antoine Perrier, Gerrit W.M. Peters, Roderic I. Pettigrew, Dominique P. Pioletti, Marieke Pluijmert, Lalao Rakotomanana, Pierre-Yves Rohan, Philippe Rouch, C. Antonio Sánchez, Wafa Skalli, Ian Stavness, Julien Stelletta, Keyi Tang, Maxim Van den Abbeele, Marc van Vijven, Arne Vogel, Nicolas Vuillerme, John S. Wilson, Saami K. Yazdani, Florence Zara, and Jingbo Zhao

Published
2017

14. Biomechanical modelling of the foot

Author

Francis Cannard, Yohan Payan, Nicolas Vuillerme, Vincent Luboz, Antoine Perrier, Marek Bucki, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), TexiSense, Laboratoire Sport et Performance Motrice (EA 597), Université Joseph Fourier - Grenoble 1 (UJF), and Y. Payan and J. Ohayon

Subjects
medicine.medical_specialty, Engineering, Ankle arthrodesis, 0206 medical engineering, 02 engineering and technology, 030204 cardiovascular system & hematology, heterogeneous soft tissues, clinical applications, biomechanical analysis, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, Gait (human), medicine, Foot ulcers, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot (prosody), business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], 020601 biomedical engineering, Finite element method, foot model, Biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, business, Biomedical engineering
Abstract

The foot exhibits a complex behavior during gait as it adapts to the ground geometry to ensure balance, but it also stores energy to ease the next step. Its subtle functionality can be affected by morphological issues, by aging, or by a disease such as diabetes. Hence, modeling the foot could improve our understanding and improve the treatment of pathological conditions. In this chapter, after presenting the foot's anatomy and functionality, we propose a survey of the principal foot models in the literature. Then we introduce our biomechanical model, which uses the finite element method to represent several soft tissue layers around an articulated skeleton of the foot, along with cables simulating the action of ligaments. Two clinical applications, namely ankle arthrodesis and foot ulcer prevention, are also presented.

Published
2017

15. Subject-specific modeling for real-time pressure ulcer prevention in sitting posture

Author

Vincent Luboz, Mathieu Bailet, Christelle Grivot, Michel Rochette, Bruno Diot, Marek Bucki, Yohan PAYAN, S.A.S. Texisense, entreprise, ANSYS France, ANSYS, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
[SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

16. ' STRAIN CLUSTERS ' ANALYSIS TO CHARACTERIZE THE RISK OF PRESSURE ULCER: APPLICATION TO HEEL ULCERS

Author

Antoine Perrier, Vincent Luboz, Marek Bucki, Cannard, F., Champion, E., Vuillerme, N., Yohan PAYAN, Payan, Yohan, S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, health care facilities, manpower, and services, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], education, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], health care economics and organizations
Abstract

International audience; Foot pressure ulcers (PU) mainly result from excessive pressure intensity (internal strains above 50% for about 10 minutes) or prolonged compression (internal strains above 20% for about two hours). It is therefore crucial to monitor the internal strains using biomechanical models combined with skin surface pressure measurements to improve daily examination. A biomechanical Finite Element foot model was elaborated to analyze the internal strains. A new criterion, defined as “cluster volume”, was introduced by considering the volume of the largest group of adjacent nodes exhibiting a Von Mises (VM) strain over the 20 and 50% thresholds.

Published
2016

17. Conception and evaluation of a 3D musculoskeletal finite element foot model

Author

Vincent Luboz, Nicolas Vuillerme, Antoine Perrier, Marek Bucki, Yohan Payan, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), ANR-10-TECS-0013,IDS,CHAUSSETTES DIABÉTIQUES INTELLIGENTES : Dispositif embarqué pour la prévention du pied diabétique(2010), and ANR-11-LABX-0004,CAMI,Gestes Médico-Chirurgicaux Assistés par Ordinateur(2011)

Subjects
Engineering, medicine.medical_specialty, Motion analysis, Biomedical Engineering, Bioengineering, Context (language use), Finite Element, Plantar Pressure, medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot (prosody), Foot model, business.industry, Plantar pressure, Deep pressure ulcer, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], General Medicine, Structural engineering, Finite element method, Computer Science Applications, Human-Computer Interaction, Musculoskeletal, Orthopedic surgery, Motion Analysis, [SDV.IB]Life Sciences [q-bio]/Bioengineering, business, Biomedical engineering
Abstract

International audience; This paper introduces a new patient-specific musculoskeletal and Finite Element (FE) model of the foot aimed to be used in the context of deep pressure ulcer prevention, orthopedic and motion analysis. This model is evaluated in both static and dynamic frameworks.

Published
2015

18. 3D musculo-skeletal finite element analysis of the foot kinematics under muscle activation with and without ankle arthrodesis

Author

Vincent Luboz, Nicolas Vuillerme, Antoine Perrier, Marek Bucki, Yohan Payan, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), S.A.S. Texisense, entreprise, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), and ANR-11-LABX-0004,CAMI,Gestes Médico-Chirurgicaux Assistés par Ordinateur(2011)

Subjects
Motion analysis, medicine.medical_specialty, Computer science, medicine.medical_treatment, Arthrodesis, Biomedical Engineering, Bioengineering, Context (language use), Kinematics, Finite Element, Physical medicine and rehabilitation, medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot model, Foot and ankle surgery, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], General Medicine, Arthroplasty, Computer Science Applications, Human-Computer Interaction, medicine.anatomical_structure, Musculoskeletal, Physical therapy, Motion Analysis, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Ankle, Cadaveric spasm
Abstract

International audience; The choice between arthrodesis and arthroplasty in the context of advanced ankle arthrosis remains a highly disputed topic in the field of foot and ankle surgery. Arthrodesis, however, represents the most popular option. Biomechanical modeling has been widely used to investigate static loading of cadaveric feet as well as consequences of arthrodesis on bony structures. Although foot kinematics has been studied using motion analysis, this approach lacks accuracy in capturing internal joints motion due to limitations inherent to external “marker sets” and the fact that it imposed the foot to be considered as a rigid solid. The consequences of arthrodesis on kinematics of the unloaded foot are not well understood although it is of crucial importance during the swing phase and at heel contact. Investigating ankle mobility during muscle contraction with and without arthrosis could explain how the motion is produced by extrinsic muscles activations affected by an arthrodesis. This study aims at defining if a biomechanical model with Finite Elements could help arthrodesis understanding.

Published
2015

19. Influence of the calcaneus shape on the risk of posterior heel ulcer using 3D patient-specific biomechanical modeling

Author

Marek Bucki, Nicolas Vuillerme, Bruno Diot, Antoine Perrier, Vincent Luboz, Francis Cannard, Yohan Payan, S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), ANR-10-TECS-0013,IDS,CHAUSSETTES DIABÉTIQUES INTELLIGENTES : Dispositif embarqué pour la prévention du pied diabétique(2010), and ANR-11-LABX-0004,CAMI,Gestes Médico-Chirurgicaux Assistés par Ordinateur(2011)

Subjects
Patient-Specific Modeling, Risk, Heel, Finite Element Analysis, Biomedical Engineering, Strain (injury), Biomechanical Phenomena, Medicine, Humans, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot Ulcer, Pressure Ulcer, business.industry, Soft tissue, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Anatomy, medicine.disease, Pressure sensor, Tendon, Calcaneus, medicine.anatomical_structure, Cushion, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Stress, Mechanical, business
Abstract

International audience; Most posterior heel ulcers are the consequence of inactivity and prolonged time lying down on the back. They appear when pressures applied on the heel create high internal strains and the soft tissues are compressed by the calcaneus. It is therefore important to monitor those strains to prevent heel pressure ulcers. Using a biomechanical lower leg model, we propose to estimate the influence of the patient-specific calcaneus shape on the strains within the foot and to determine if the risk of pressure ulceration is related to the variability of this shape. The biomechanical model is discretized using a 3D Finite Element mesh representing the soft tissues, separated into four domains implementing Neo Hookean materials with different elasticities: skin, fat, Achilles' tendon, and muscles. Bones are modelled as rigid bodies attached to the tissues. Simulations show that the shape of the calcaneus has an influence on the formation of pressure ulcers with a mean variation of the maximum strain over 6.0 percentage points over 18 distinct morphologies. Furthermore, the models confirm the influence of the cushion on which the leg is resting: a softer cushion leading to lower strains, it has less chances of creating a pressure ulcer. The methodology used for patient-specific strain estimation could be used for the prevention of heel ulcer when coupled with a pressure sensor.

Published
2015

20. Modélisation biomécanique 3D de la cinématique du pied sous activation musculaire avec et sans arthrodèse de cheville

Author

Wilfrid Graff, Yohan Payan, Antoine Perrier, and Marek Bucki

Subjects
Orthopedics and Sports Medicine, Surgery
Abstract

Introduction Le choix therapeutique entre arthrodese et arthroplastie dans le cadre de l’arthrose evoluee de cheville reste l’un des sujets les plus discutes en chirurgie du pied. La mobilite du pied ne peut se faire que dans les articulations restees libres en cas d’arthrodese de cheville. La contraction des muscles extrinseques permettant le bon positionnement du pied en phase oscillante et en phase d’appui unipodal, il semble important de comprendre le poids de ces contractions sur la mobilite residuelle du pied. La modelisation biomecanique permet de simuler ce type d’interactions. Materiel et methodes Un modele musculosquelettique et elements finis du pied a ete developpe en suivant les regles de l’anatomie fonctionnelle. Il associe une modelisation par corps rigides pour les interactions osseuses et articulaires et une modelisation par elements finis pour les tissus mous du pied. Une simulation utilisant les patterns d’activation musculaire pour la flexion dorsale et plantaire de cheville a ete realisee avec et sans arthrodese. Les mobilites du talus et du reste des os du pied ont ete enregistrees notamment par des mesures cinematiques en 3D. Des projections sur les plans de references anatomiques ont permis d’obtenir une analogie de goniometrie clinique. Une comparaison des mobilites avec et sans arthrodese, sous pilotage musculaire, a ete effectuee pour l’angle « tibia, centre de masse du talus, centre de la tete de M2 » dit « angle pied ». Resultats Pour la flexion dorsale 2D maximale, 41° sans arthrodese et 8° avec arthrodese pour le sujet modelise. Pour la flexion plantaire 2D maximale, ces angles sont de 61° et 21° respectivement. Discussion Il est a noter qu’il reste une flexion plantaire de 21° avec arthrodese. Avec 3,3° issus de la mobilite naviculaire, 2,4° issus de la mobilite du calcaneenne, cela signifie qu’il y a un potentiel de mobilite cumule de 14,3° dans l’articulation sous talaire et les articulations du medio-pied. Cela est concordant avec les conclusions de la litterature qui decrivent 60 % des arthroses post-arthrodese tibiotalaire dans le tarse anterieur. Conclusion La modelisation permet dorenavant de simuler les mobilites du pied suivant les differentes contractions musculaires en prenant en compte les tissus mous ainsi que la modification de leur action apres une arthrodese.

Published
2017

21. Biomechanical simulation of the Charcot neuroarthropathic foot with plantar ulcer

Author

Nicolas Vuillerme, Marek Bucki, Yohan Payan, Antoine Perrier, and Georges Ha Van

Subjects
Orthodontics, business.industry, Rehabilitation, Soft tissue, medicine.disease_cause, medicine.disease, Diabetic foot, Weight-bearing, medicine.anatomical_structure, Gait (human), Peripheral neuropathy, Cuboid bone, medicine, Orthopedics and Sports Medicine, Ankle, business, Foot (unit)
Abstract

Objective Diabetic patients with long-term diabetes are mainly affected by peripheral neuropathy. This can lead to the Charcot neuropathic osteoarthropathy (CNO). The CNO results in dramatic deformities and dysfunctional foot and ankle complex. The gait and stance are modified and overloads occur because of overpressures below the bony prominences. As the neuropathy makes the region insensitive to pain, foot ulcers can appear. Currently, there is no way to predict foot ulcer resulting from the foot anatomy reconfiguration induced by CNO. The purpose of this study is to address this issue. Material/patients and methods A Type 2 CNO foot was reconstructed using the CT-scan modality and the corresponding biomechanical finite element (FE) model was created. This model includes bones as rigid bodies and represents the soft tissues of the foot as two different sub-domains. The sole of the foot model is put in contact with a virtual horizontal pedobarographic platform. The Charcot patient was asked to perform a static standing acquisition of plantar pressures using a Zebris platform. The collected pressures were applied on the FE foot sole in order to compute internal strains. Then, the foot model including gravity and contact with the virtual pedobarographic platform was used to simulate a standing position. The corresponding sole pressure and internal strains thus computed can therefore be respectively compared with the measured standing plantar pressures and with the internal strains simulated from the measured boundary conditions. Results The volumes and location of the largest clusters with contiguous nodes with Von Mises (VM) strains over 20% or 50% are similar (errors Discussion – conclusion The FE model of the type 2 CNO can predict, in weight bearing position, the location and the proportion of the Von Mises Strains in the soft tissue of the diabetic foot. The location is similar to the real plantar ulcer for this patient and the plantar pressure values are in accordance with the measurements. Indeed, a peak pressure value of 19.6 N/cm2 is simulated in regard of the cuboid bone, which happens to be the actual location of the ulcer.

Published
2017

22. Smart Diabetic Socks: Embedded device for diabetic foot prevention

Author

Jean-Philippe Bourg, Marek Bucki, Antoine Perrier, Francis Cannard, Nicolas Vuillerme, Yohan Payan, Delphine Rin, Bruno Diot, Denis Colin, Vincent Luboz, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), S.A.S. Texisense, entreprise, Centre de rééducation fonctionnelle de l'Arche, Institut Français du Textile et de l'Habillement (IFTH), IFTH, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
medicine.medical_specialty, computer.internet_protocol, medicine.medical_treatment, finite element method, Biomedical Engineering, Biophysics, FOS: Physical sciences, Context (language use), pressure ulcer prevention, Physical medicine and rehabilitation, medicine, Foot ulcers, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], diabetes, business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], medicine.disease, Diabetic foot, Gait, Physics - Medical Physics, 3. Good health, High stress, SOCKS, Amputation, biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Medical Physics (physics.med-ph), business, computer, Foot (unit), diabetic foot
Abstract

International audience; 1) Objectives Most foot ulcers are the consequence of a trauma (repetitive high stress, ill-fitting footwear, or an object inside the shoe) associated to diabetes. They are often followed by amputation and shorten life expectancy. This paper describes the prototype of the Smart Diabetic Socks that has been developed in the context of the French ANR TecSan project. The objective is to prevent pressure foot ulcers for diabetic persons. 2) Material and methods A fully wireless, customizable and washable "smart sock" has been designed. It is made of a textile which fibers are knitted in a way they provide measurements of the pressure exerted under and all around the foot in real-life conditions. This device is coupled with a subject-specific Finite Element foot model that simulates the internal strains within the soft tissues of the foot. 3) Results A number of derived stress indicators can be computed based on that analysis, such as the accumulated stress dose, high internal strains or peak pressures near bony prominences during gait. In case of risks for pressure ulcer, an alert is sent to the person and/or to the clinician. A watch, a smart-phone or a distant laptop can be used for providing such alert.

Published
2014

23. Foot ulcer prevention using biomechanical modelling

Author

Francis Cannard, Vincent Luboz, Ian Stavness, Bruno Diot, Marek Bucki, John E. Lloyd, Antoine Perrier, Yohan Payan, Nicolas Vuillerme, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, Department of Computer Science [Saskatoon, Saskatchewan] (U of S), University of Saskatchewan [Saskatoon] (U of S), Human Communication Technologies Research Laboratory (UBC), University of British Columbia (UBC), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), and ANR-10-TECS-0013,IDS,CHAUSSETTES DIABÉTIQUES INTELLIGENTES : Dispositif embarqué pour la prévention du pied diabétique(2010)

Subjects
business.industry, 0206 medical engineering, Biomedical Engineering, Computational Mechanics, Soft tissue, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], 02 engineering and technology, Anatomy, 020601 biomedical engineering, Computer Science Applications, 03 medical and health sciences, 0302 clinical medicine, Medicine, Radiology, Nuclear Medicine and imaging, Biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Foot ulcers, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], business, 030217 neurology & neurosurgery, Foot (unit)
Abstract

International audience; Foot ulcers are a common complication of diabetes and are the consequence of trauma to the feet and a reduced ability to perceive pain in persons with diabetes. Ulcers appear internally when pressures applied on the foot create high internal strains below bony structures. It is therefore important to monitor tissue strains in persons with diabetes. We propose to use a biomechanical model of the foot coupled with a pressure sensor to estimate the strains within the foot and to determine if they can cause ulcer formation. Our biomechanical foot model is composed of a Finite Element mesh representing the soft tissues, separated into four Neo Hookean materials with different elasticity: plantar skin, non-plantar skin, fat and muscles. Rigid body models of the bones are integrated within the mesh to rigidify the foot. Thirty-three joints connect those bones around cylindrical or spherical pivots. Cables are included to represent the main ligaments in order to stabilize the foot. This model simulates a realistic behavior when the sole is subjected to pressures measured with a sensor during bipedal standing. Surface strains around 5 % are measured below the heel and metatarsal heads while internal strains are close to 70 %. This strain estimation, when coupled to a pressure sensor, could consequently be used in a patient alert system to prevent ulcer formation.

Published
2014

24. Biomechanical Modeling to Prevent Ischial Pressure Ulcers

Author

Bruno Diot, Yohan Payan, Vincent Luboz, Marion Petrizelli, Nicolas Vuillerme, Marek Bucki, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), and Informatique de Sécurité (IDS S.A.)

Subjects
Adult, Male, Models, Anatomic, Materials science, Posture, Biomedical Engineering, Biophysics, Strain (injury), pressure ulcer prevention, Sitting, biomechanics, Ischium, Elastic Modulus, Pressure, medicine, Humans, Computer Simulation, Orthopedics and Sports Medicine, paraplegics, Buttocks, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Muscle, Skeletal, Skin, Paraplegia, Pressure Ulcer, finite element model, Rehabilitation, Biomechanics, Soft tissue, Stiffness, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Compression (physics), medicine.disease, Pressure sensor, 3. Good health, medicine.anatomical_structure, Adipose Tissue, computer assisted medical interventions, Elasticity Imaging Techniques, [SDV.IB]Life Sciences [q-bio]/Bioengineering, France, medicine.symptom, buttocks, Biomedical engineering
Abstract

With 300,000 paraplegic persons only in France, ischial pressure ulcers represent a major public health issue. They result from the buttocks' soft tissues compression by the bony prominences. Unfortunately, the current clinical techniques, with – in the best case – embedded pressure sensor mats, are insufficient to prevent them because most are due to high internal strains which can occur even with low pressures at the skin surface. Therefore, improving prevention requires using a biomechanical model to estimate internal strains from skin surface pressures. However, the buttocks' soft tissues' stiffness is still unknown. This paper provides a stiffness sensitivity analysis using a finite element model. Different layers with distinct Neo Hookean materials simulate the skin, fat and muscles. With Young moduli in the range [100–500 kPa], [25–35 kPa], and [80–140 kPa] for the skin, fat, and muscles, respectively, maximum internal strains reach realistic 50 to 60% values. The fat and muscle stiffnesses have an important influence on the strain variations, while skin stiffness is less influent. Simulating different sitting postures and changing the muscle thickness also result in a variation in the internal strains. & 2014 Elsevier Ltd. All rights reserved.

Published
2014

25. Biomechanical simulation of the Charcot neuroarthropathic foot with plantar ulcer

Author

Antoine Perrier, Nicolas Vuillerme, Vincent Luboz, Marek Bucki, Bruno Diot, Francis Cannard, Georges Ha Van, Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, CHU Pitié-Salpêtrière [AP-HP], and Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)

Subjects
[SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, pressure ulcer prevention, finite element foot model, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
Abstract

International audience; Diabetic patients with long-term diabetes are mainly affected by peripheral neuropathy. This lack of sensitivity induces a destructive process affecting joints and bony structures which can lead to the Charcot neuropathic osteoarthropathy (CNO). A CNO foot was reconstructed using the CT-Scan modality and the corresponding biomechanical finite element (FE) model was created. This model is able to predict, in weight bearing position, the location and the proportion of the Von Mises Strains in the soft tissue of the diabetic foot.

Published
2014

26. Modéliser les tissus mous pour mieux prévenir les escarres

Author

Vincent Luboz, Marek Bucki, Antoine Perrier, Bruno Diot, Francis Cannard, Nicolas Vuillerme, Yohan PAYAN, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), and Informatique de Sécurité (IDS S.A.)

Subjects
prévention des escarres, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, blessé médullaire, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
Abstract

National audience; La prévalence des escarres du blessé médullaire reste aujourd'hui très (trop) importante. Quatre briques devraient selon nous être assemblées pour constituer un dispositif efficace de prévention des escarres : (1) la présence d'un support optimisant la répartition des pressions de surface, (2) la mesure en continu de ces pressions de surface, (3) l'estimation des déformations internes aux tissus mous avec (4) la détection d'un risque d'escarre et l'envoi d'une alerte en direction de la personne. Cet article focalise sur les trois dernières briques qui restent à assembler pour construire un dispositif efficace de prévention des escarres.

Published
2014

27. Influence of the calcaneus morphology on the risk of posterior heel ulcer creation

Author

Vincent Luboz, Antoine Perrier, Marek Bucki, Bruno Diot, Francis Cannard, Nicolas Vuillerme, Yohan PAYAN, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), ANR-10-TECS-0013,IDS,CHAUSSETTES DIABÉTIQUES INTELLIGENTES : Dispositif embarqué pour la prévention du pied diabétique(2010), Payan, Yohan, and Technologies pour la santé et l'autonomie - CHAUSSETTES DIABÉTIQUES INTELLIGENTES : Dispositif embarqué pour la prévention du pied diabétique - - IDS2010 - ANR-10-TECS-0013 - TecSan - VALID

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, patient specific, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], biomechanical model, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, pressure ulcer prevention, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], heel modelling
Abstract

International audience; Forty percent of the reanimation or geriatric patients develop a pressure ulcer, of which 40 % are posterior heel ulcers. The main suspected causes are the excessive pressure intensity (leading to internal strains above 50 % for about 10 minutes) and prolonged compression (leading to internal strains above 20 % for about two hours) [1]. Prevention based on daily clinical examination lacks efficiency because deep tissue injuries result from internal strains and when visual symptoms appear it is often too late for treatment. It is consequently important to monitor the internal strains on a patient-specific basis as the shape of the calcaneus in the lying patient might affect the outcome. Based on our previous foot model [2], we study the influence of the calcaneus shape on internal strains. The Finite Element (FE) model used here represents the soft tissues of the lower leg and is composed of four different sub-domains each modelled using a Neo Hookean material with Young moduli and Poisson ratios of 200 kPa and 0.495 for the skin, 30 kPa and 0.49 for the fat, 1 GPa and 0.495 for the tendon, and 60 kPa and 0.495 for the muscles [3], see figure. Bones are modelled as rigid solids. This leg model rests on a FE model of a cushion with three compartments of varying stiffness: under the calf, the Achilles tendon, and the heel back. Simulations carried out on 18 models each implementing a different calcaneus demonstrate the influence of this bone's morphology on the magnitude of internal strains with a standard deviation (STD) of the Von Mises strains of 19.3 percentage points. Additionally, the model was used to identify the supporting cushions' stiffness combination that minimizes the ulceration risk for each individual. The pressure magnitudes below the different sections of the lower leg can be related to the speed of the pressure ulcer creation: higher cushion stiffness below the heel lead to a mean internal strain of 56.9 % with a STD of 13.2 % and could result in ulcers in less than 10 minutes, while mild cushion stiffness maintain the internal strains between 20 and 50 % (with a mean internal strain of 27.7 % with a STD of 2.0 %) and the risk of ulcer creation around two hours [1]. Additionally, the maximal strains are located at the interface between the calcaneus and the fat layer when the cushion is more inflated under the heel, therefore increasing the risk of pressure ulcer when maintained for a long time.

Published
2014

28. Multi-modal framework for subject-specific finite element model generation aimed at pressure ulcer prevention

Author

Marek Bucki, Nicolas Vuillerme, Francis Cannard, Bruno Diot, Yohan Payan, S.A.S. Texisense, entreprise, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), and Informatique de Sécurité (IDS S.A.)

Subjects
Models, Anatomic, Pressure ulcer risk, Engineering, 0206 medical engineering, Finite Element Analysis, Biomedical Engineering, Bioengineering, 02 engineering and technology, pressure ulcer prevention, 03 medical and health sciences, 0302 clinical medicine, paraplegia, Imaging, Three-Dimensional, Image Processing, Computer-Assisted, Humans, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Pressure Ulcer, business.industry, Subject specific, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], General Medicine, Structural engineering, smart textile, Assessment scale, 020601 biomedical engineering, Industrial engineering, Finite element method, Computer Science Applications, Human-Computer Interaction, Radiography, Modal, Pressure Ulcer Prevention, Buttocks, [SDV.IB]Life Sciences [q-bio]/Bioengineering, business, 030217 neurology & neurosurgery
Abstract

International audience; This study outlines a methodology aiming at the definition of an individual and personalised pressure ulcer risk assessment scale based on patient-specific biomechanical modelling

Published
2013

29. Finite Element Modeling of Soft Tissues for Pressure Ulcers Prevention

Author

Vincent Luboz, Antoine Perrier, Marek Bucki, Nicolas Vuillerme, Francis Cannard, Diot, B., Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), S.A.S. Texisense, entreprise, Informatique de Sécurité (IDS S.A.), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
buttocks model, finite element, education, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, pressure ulcer prevention, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], digestive system diseases, biomechanics, foot model
Abstract

International audience; This paper introduces the biomechanical models that were developed in the context of paraplegic pressure ulcer and diabetic foot ulcer preventions. A Finite Element model (FE) of the buttocks soft tissues and an FE model of the foot are described and used to predict high internal strains. Such strains are indeed known as being at the origin of pressure ulcers.

Published
2013

30. TexiCare: An innovative embedded device for pressure ulcer prevention. Preliminary results with a paraplegic volunteer

Author

Marek Bucki, Olivier Chenu, Francis Cannard, Bruno Diot, Nicolas Vuillerme, Yohan Payan, S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Informatique de Sécurité (IDS S.A.), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Institut Carnot LSI, and Labex CAMI ANR-11-LABX-0004

Subjects
Male, Volunteers, medicine.medical_specialty, Interface (computing), 0206 medical engineering, Pilot Projects, 02 engineering and technology, Dermatology, pressure ulcer prevention, Pathology and Forensic Medicine, 03 medical and health sciences, ALARM, 0302 clinical medicine, Physical medicine and rehabilitation, Wheelchair, paraplegic person, Pressure, Medicine, Humans, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Volunteer, Aged, Paraplegia, Pressure Ulcer, Modality (human–computer interaction), business.industry, End user, Textiles, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Usability, Equipment Design, smart textile, 020601 biomedical engineering, Surgery, Wheelchairs, Pressure Ulcer Prevention, biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, business, 030217 neurology & neurosurgery
Abstract

International audience; This paper introduces the recently developed TexiCare device that aims at preventing pressure ulcers for people with spinal cord injury. This embedded device is aimed to be mounted on the user wheelchair. Its sensor is 100% textile and allows the measurement of pressures at the interface between the cushion and the buttocks. It is comfortable, washable and low cost. It is connected to a cigarette-box sized unit that (i) measures the pressures in real time, (ii) estimates the risk for internal over-strains, and (iii) alerts the wheelchair user whenever necessary. The alert method has been defined as a result of a utility/usability/acceptability study conducted with representative end users. It is based on a tactile-visual feedback (via a watch or a smartphone for example): the tactile modality is used to discreetly alarm the person while the visual modality conveys an informative message. In order to evaluate the usability of the TexiCare device, a paraplegic volunteer equipped his wheelchair at home during a six months period. Interestingly, the first results revealed bad habits such as an inadequate posture when watching TV, rare relief maneuvers, and the occurrence of abnormal high pressures.

Published
2013

31. Foot biomechanical modeling to study orthoses influence

Author

Nicolas Vuillerme, Marek Bucki, Yohan Payan, Francis Cannard, Antoine Perrier, and Vincent Luboz

Subjects
Orthodontics, Finite element method, Computer science, Orthosis design, Rehabilitation, Orthopedics and Sports Medicine, Biomechanical modeling, Patient-specific models, Foot (unit)
Published
2012
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32. Modélisation biomécanique du pied pour étudier l’influence des orthèses

Author

Yohan Payan, Marek Bucki, Vincent Luboz, Francis Cannard, Nicolas Vuillerme, and Antoine Perrier

Subjects
Rehabilitation, Orthopedics and Sports Medicine
Abstract

cote ampute et aux sujets sains). Discussion.– Nos resultats sont comparables a ceux presentes chez des patients amputes tibiaux et femoraux, ce qui souligne le role primordial la cheville pour le controle des mouvements du corps et la production de forces lors de la posture debout et l’initiation de la marche. Chez les desarticules, l’absence des muscles de hanche conduit a une augmentation critique du transfert du poids du corps lors de l’initiation de la marche par le membre sain, et a des difficultes lors de l’equilibre unipodal et l’avancee de la prothese. En consequence, initier la marche en avancant le cote appareille est plus sur pour les desarticules, meme si cette strategie est plus lente qu’avec le membre non-ampute. Il semble donc, au vu de ces premiers resultats, que l’initiation de la marche avec une prothese soit une tâche complexe pour les patients desarticules de hanche.

Published
2012
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33. Doppler Ultrasound Driven Biomechanical Model of the Brain for Intraoperative Brain-Shift Compensation: A Proof of Concept in Clinical Conditions

Author

Yohan Payan, Marek Bucki, Olivier Palombi, Mathieu Bailet, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Intuitive Modeling and Animation for Interactive Graphics & Narrative Environments (IMAGINE), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Anatomie des Alpes Françaises (LADAF), CHU Grenoble, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Yohan Payan, VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Laboratoire Jean Kuntzmann (LJK), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
medicine.medical_specialty, Neuronavigation, Brain-shift, Brain tumor, Doppler ultrasound, Magnetic resonance angiography, 030218 nuclear medicine & medical imaging, Compensation (engineering), 03 medical and health sciences, 0302 clinical medicine, Medicine, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], medicine.diagnostic_test, business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], medicine.disease, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, Proof of concept, Finite Element Method, Biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Neurosurgery, Biomechanical modeling, business, 030217 neurology & neurosurgery, Biomedical engineering
Abstract

International audience; Accurate localization of the target is essential to reduce morbidity during brain tumor removal interventions. Yet, image-guided neurosurgery faces an important issue for large skull openings where brain soft-tissues can exhibit large deformations in the course of surgery. As a consequence of this "brain-shift" the pre-operatively acquired images no longer correspond to reality and subsequent neuronavigation is therefore strongly compromised. In this article we present a neuronavigator which addresses this issue and offers passive help to the surgeon by displaying the position of the guided tools with respect to the corrected location of the anatomical features. This low-cost system relies on localized 2D Doppler ultrasound imaging of the brain which makes it possible to track the vascular tree deformation throughout the intervention. An elastic registration procedure is used to match the shifted tree with its pre-operative structure identified within Magnetic Resonance Angiography images. A patient speci c Finite Element biomechanical model of the brain further extends the resulting sparse deformation field to the overall organ volume. Finally, the estimated global deformation is applied to all pre-operatively available volumetric images or data, such as tumor contours, and the corrected planning is displayed to the surgeon. The system, tested on a patient presenting a large meningioma, was able to compensate within seconds for the intraoperatively observed brain-shift, reducing the mean error on tumor margin localization from 3.5 mm (max=7.6 mm, RMS=3.7 mm) to 0.9 mm (max=1.7 mm, RMS=1.0 mm).

Published
2012

34. Real-time monitoring of the pressures at the seat-buttock interface

Author

Olivier Chenu, Nicolas Vuillerme, Marek Bucki, Bruno Diot, Francis Cannard, Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Informatique de Sécurité (IDS S.A.), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
biomechanical model, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, pressure ulcer prevention, smart textile, pressure sensor, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2012

35. Patient-specific finite element model of the buttocks for pressure ulcer prevention - linear versus non-linear modelling

Author

Marek Bucki, Vincent Luboz, Claudio Lobos, Francis Cannard, Yohan Payan, Bruno Diot, Nicolas Vuillerme, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), S.A.S. Texisense, entreprise, Informatique de Sécurité (IDS S.A.), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
medicine.medical_specialty, Pressure sores, 0206 medical engineering, finite element method, Biomedical Engineering, ComputerApplications_COMPUTERSINOTHERSYSTEMS, Bioengineering, 02 engineering and technology, pressure ulcer prevention, Wheelchair, 0202 electrical engineering, electronic engineering, information engineering, medicine, Humans, Buttocks, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Spinal cord injury, Pressure Ulcer, Models, Statistical, business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], 020207 software engineering, General Medicine, Patient specific, medicine.disease, 020601 biomedical engineering, Finite element method, 3. Good health, Computer Science Applications, Human-Computer Interaction, medicine.anatomical_structure, Physical therapy, Pressure Ulcer Prevention, biomechanical model, Biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, InformationSystems_MISCELLANEOUS, business
Abstract

International audience; Currently available techniques and/or protocols designed to prevent pressure sore formation in persons with spinal cord injury and wheelchair users are mainly based on the improvement of the skin/support interface and on postural and behavioural education. These techniques, however, seem to lack efficiency as the prevalence and incidence of pressure sores still remains very high. This study outlines a methodology aiming at the definition of an individual and personalised pressure ulcer risk assessment scale based on patient-specific Finite Element modelling of the buttocks.

Published
2012

36. Foot biomechanical modelling to study orthoses influence

Author

Marek Bucki, Nicolas Vuillerme, Yohan Payan, Francis Cannard, Antoine Perrier, Vincent Luboz, Bruno Diot, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), S.A.S. Texisense, entreprise, Informatique de Sécurité (IDS S.A.), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
Orthotic Devices, Engineering, medicine.medical_specialty, Finite Element Analysis, Biomedical Engineering, Bioengineering, orthoses, 030218 nuclear medicine & medical imaging, Biomechanical Phenomena, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, medicine, Humans, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Foot (prosody), Foot, business.industry, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], General Medicine, Models, Theoretical, Patient specific, medicine.disease, Diabetic foot, Orthotic device, 3. Good health, Computer Science Applications, Human-Computer Interaction, Finite Element Foot model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, business, 030217 neurology & neurosurgery
Abstract

International audience; Several pathologies of the foot can be solved simply by adding an orthosis under the patient's foot. Defining the geometry and the size of such orthosis is key in optimizing its influence on the foot. Unfortunately, most of the orthoses produced today are not specifically design for a patient. They allow improvements to some degrees but could be more efficient if they were patient specific. We propose to use a patient-specific finite element foot model to study the influence of such orthoses and to help designing them in a better way, in accordance with the patient's anatomy and pathology.

Published
2012

37. Biomechanical modeling of the foot to study and prevent the formation of ulcers

Author

Marek Bucki, Vincent Luboz, Francis Cannard, Ian Stavness, Yohan Payan, Payan, Yohan, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, Human Communication Technologies Research Laboratory (UBC), University of British Columbia (UBC), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
medicine.medical_specialty, 0206 medical engineering, Biomedical Engineering, Biophysics, 02 engineering and technology, biomechanics, 03 medical and health sciences, 0302 clinical medicine, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], medicine, Orthopedics and Sports Medicine, Foot ulcers, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Orthodontics, finite element model, [SDV.IB] Life Sciences [q-bio]/Bioengineering, business.industry, Rehabilitation, Biomechanics, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Soft tissue, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], 020601 biomedical engineering, 3. Good health, Surgery, Critical level, pressure ulcers prevention, [SDV.IB]Life Sciences [q-bio]/Bioengineering, business, 030217 neurology & neurosurgery, Foot (unit)
Abstract

International audience; Most of the foot ulcers are created by compression of the soft tissues (muscles, fat, skin, tendons, and ligaments) by the bones. Such ulcers are treatable when discovered early but can have dramatic outcomes as time passes. Unfortunately, the natural prevention of ulcerations is disturbed when patients are immobilised or cannot feel their extremities (due to nervous disabilities or diabetes). Our group has proposed the "Smart Sock" which is a 100% textile device made of a network of pressure sensors monitoring the stresses applied around the foot. The idea is to estimate, from these surface stresses, the internal stresses that might be at risk using a patient-specific Finite Element model of the foot. When internal pressures computed by the model reach a critical level, a warning is sent to the patient.

Published
2012

38. Pressure ulcer prevention in spinal cord injury subjects using the TexiSense pressure sensing textile

Author

Yohan Payan, Bruno Diot, Nicolas Vuillerme, Marek Bucki, Francis Cannard, Denis Colin, Olivier Chenu, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Informatique de Sécurité (IDS S.A.), Centre de rééducation fonctionnelle de l'Arche, Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
030506 rehabilitation, Pressure sensor, Prevention, Rehabilitation, textile sensor, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], pressure ulcer prevention, 3. Good health, 03 medical and health sciences, 0302 clinical medicine, biomechanical model, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Orthopedics and Sports Medicine, Biomechanical modeling, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Pressure ulcers, 0305 other medical science, ComputingMilieux_MISCELLANEOUS, 030217 neurology & neurosurgery
Abstract

Cet article presente un prototype embarque de prevention des escarres fonde sur l'utilisation d'une nappe textile capable de collecter les pressions exercees a l'interface coussin/fesses du blesse medullaire.

Published
2011
Full Text
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39. Facial Reconstruction as a Regression Problem

Author

Marek Bucki, Françoise Tilotta, Joan Alexis Glaunès, Michel Desvignes, Yves Rozenholc, Yohan Payan, Maxime Berar, Laboratoire d'Informatique, de Traitement de l'Information et des Systèmes (LITIS), Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-IMAG-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratory of Functional Anatomy, Université Paris Descartes - Paris 5 (UPD5), Mathématiques Appliquées Paris 5 (MAP5 - UMR 8145), Université Paris Descartes - Paris 5 (UPD5)-Institut National des Sciences Mathématiques et de leurs Interactions (INSMI)-Centre National de la Recherche Scientifique (CNRS), AGPIG (GIPSA-AGPIG), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-IMAG-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-IMAG-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire d'Informatique, de Traitement de l'Information et des Systèmes ( LITIS ), Institut national des sciences appliquées Rouen Normandie ( INSA Rouen Normandie ), Normandie Université ( NU ) -Normandie Université ( NU ) -Université de Rouen Normandie ( UNIROUEN ), Normandie Université ( NU ) -Université Le Havre Normandie ( ULH ), Normandie Université ( NU ), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications [Grenoble] ( TIMC-IMAG ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -IMAG-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Université Paris Descartes - Paris 5 ( UPD5 ), Mathématiques Appliquées à Paris 5 ( MAP5 - UMR 8145 ), Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National des Sciences Mathématiques et de leurs Interactions-Centre National de la Recherche Scientifique ( CNRS ), AGPIG ( GIPSA-AGPIG ), Département Images et Signal ( GIPSA-DIS ), Grenoble Images Parole Signal Automatique ( GIPSA-lab ), Université Pierre Mendès France - Grenoble 2 ( UPMF ) -Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Pierre Mendès France - Grenoble 2 ( UPMF ) -Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Grenoble Images Parole Signal Automatique ( GIPSA-lab ), Université Pierre Mendès France - Grenoble 2 ( UPMF ) -Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Pierre Mendès France - Grenoble 2 ( UPMF ) -Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), GMCAO, Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -IMAG-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -IMAG-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), GIPSA - Architecture, Géométrie, Perception, Images, Gestes (GIPSA-AGPIG), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), and Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)

Subjects
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, 02 engineering and technology, Latent variable, 03 medical and health sciences, 0302 clinical medicine, 020401 chemical engineering, [MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], Position (vector), [ INFO.INFO-TI ] Computer Science [cs]/Image Processing, medicine, Polygon mesh, Computer vision, [ MATH.MATH-ST ] Mathematics [math]/Statistics [math.ST], 030216 legal & forensic medicine, 0204 chemical engineering, Blossom algorithm, ComputingMethodologies_COMPUTERGRAPHICS, Ground truth, business.industry, [STAT.TH]Statistics [stat]/Statistics Theory [stat.TH], [ STAT.TH ] Statistics [stat]/Statistics Theory [stat.TH], Regression, Skull, Geography, medicine.anatomical_structure, [INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV], Principal component regression, Artificial intelligence, business
Abstract

International audience; In this paper, we present a computer-assisted method for facial reconstruction : this method provides an estimation of the facial outlook associated with unidentified skeletal remains. Current computer-assisted methods using a statistical framework rely on a common set of points extracted form the bone and soft-tissue surfaces. Facial reconstruction then attempt to predict the position of the soft-tissue surface points knowing the positions of the bone surface points. We propose to use linear latent variable regression methods for the prediction (such as Principal Component Regression or Latent Root Root Regression) and to compare the results obtained to those given by the use of statistical shape models. In conjunction, we have evaluated the influence of the number of skull landmarks used. Anatomical skull landmarks are completed iteratively by points located upon geodesics linking the anatomical landmarks. They enable us to artificially augment the number of skull points. Facial landmarks are obtained using a mesh- matching algorithm between a common reference mesh and the individual soft-tissue surface meshes. The proposed method is validated in terms of accuracy, based on a leave-one-out cross- validation test applied on a homogeneous database. Accuracy measures are obtained by computing the distance between the reconstruction and the ground truth. Finally, these results are discussed in regard to current computer-assisted facial reconstruction techniques, including deformation based techniques.

Published
2011

40. The TexiSense ' Smart Sock ' - Textile Pressure Sensor and 3D Real-time Finite Element Model of the Diabetic Foot for a Daily Prevention of Pressure Ulcers

Author

Marek Bucki, Nicolas Vuillerme, Francis Cannard, Bruno Diot, Gérard Becquet, Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Informatique de Sécurité (IDS S.A.), Centre de l'Arche, Centre de l'Arche [PRH Le Mans], Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
biomechanical model, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, smart textile, pressure ulcer prevention, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS, diabetic foot
Abstract

International audience

Published
2011

41. Conception et évaluation centrée utilisateur d'une technologie innovante au service de l'autonomie et du handicap : « VIGI-SORE » - Dispositif embarqué de prévention des escarres

Author

Petra Hlavackova, Olivier Chenu, Yohan PAYAN, Bruno Diot, Francis Cannard, Marek Bucki, Jacques Demongeot, Nicolas Vuillerme, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Informatique de Sécurité (IDS S.A.), entreprise, and S.A.S. Texisense

Subjects
mesure des pressions, [SCCO.NEUR]Cognitive science/Neuroscience, prévention des escarres, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, blessé médullaire, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], suppléance, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

International audience; La prévention des escarres chez le blessé médullaire, compte tenu de leur prévalence, des conséquences sur la qualité de vie des personnes atteintes et des coûts de prise en charge, constitue une priorité de santé publique majeure qui n'a pas aujourd'hui de solutions thérapeutiques fiables et satisfaisantes. C'est dans ce contexte médical, sociétal et économique que nous avons mis au point un dispositif de prévention des escarres du blessé médullaire. Nous présentons ici notre démarche ergonomique de conception et d'évaluation centrée utilisateur, ainsi que les principaux résultats de ce travail. Trois étapes ont été suivies: conception participative, prototypage et évaluation en termes d'utilisabilité. Une étude de conception participative menée auprès de blessés médullaires paraplégiques a conduit à décrire le principe de fonctionnement du dispositif de suppléance perceptive tactilo-visuelle de prévention des escarres VIGI-SORE comme suit: (1) mesure en continu et en temps réel des pressions sur l'assise et le dossier du fauteuil à l'aide de capteurs ; (2) identification des zones de souffrance tissulaire à partir de l'analyse automatique des surpressions enregistrées ; (3) estimation des changements posturaux optimaux à réaliser pour soulager ces zones de souffrance à partir de la simulation informatique des cartographies de pressions associées à différentes postures ; (4) si nécessaire, retour d'information à la personne paraplégique selon les 2 modalités: une alerte (via un système de vibreur tactile au poignet ou téléphone portable) d'un risque de formation d'escarre, et une information (via affichage de messages textuels ou iconographiques sur une montre ou un écran déporté) de la distribution des pressions fessières ou d'un changement postural qui soulagerait la zone de souffrance ; (5) recueil, transmission et stockage de l'ensemble des pressions mesurées afin de constituer une base de données épidémiologiques personne-dépendante avec comme objectif une remontée des informations vers le personnel médical. Sur la base des spécifications de ce cahier des charges et de principes et recommandations ergonomiques, un prototype a été mis au point, puis évalué en termes d'utilisabilité auprès d'utilisateurs potentiels (norme ISO 9241-11). Les premiers résultats de cette évaluation ont montré que les blessés médullaires paraplégiques sont capables d'utiliser, avec efficacité, efficience et satisfaction dans le contexte d'utilisation spécifié, le dispositif VIGI-SORE pour améliorer la distribution spatiale au cours du temps de la pression exercée sur les tissus mous à l'interface saillies osseuses/fauteuil en vue de prévenir la formation d'une escarre fessière. En définitive, notre démarche ergonomique centrée utilisateur a permis d'orienter les choix de conception du dispositif de prévention des escarres pour assurer une meilleure adaptation au profil/besoins/attentes des futurs utilisateurs.

Published
2011

42. Modèle Biomécanique par Eléments Finis du Pied Diabétique pour la Prévention en Temps Réel de la Formation des Ulcères Plantaires

Author

Marek Bucki, Nicolas Vuillerme, Francis Cannard, Bruno Diot, Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), S.A.S. Texisense, entreprise, Informatique de Sécurité (IDS S.A.), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
biomécanique, diagnostic, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], suppléance, pied diabétique
Abstract

International audience; Les complications liées au diabète sont parmi les causes les plus fréquentes d'amputation du membre inférieur. Cette pathologie connue sous le nom de « pied diabétique » est liée, entre autres, à la neuropathie qui empêche la personne diabétique de percevoir la douleur due à des surpressions exercées sur la voûte plantaire. Nous proposons une technique de modélisation biomécanique permettant de : 1) prendre en compte l'anatomie du pied du sujet; 2) estimer au moyen d'un modèle biomécanique de type Eléments Finis (EF) le champ de contraintes internes à partir de mesures de pressions externes; et 3) suivre l'évolution des contraintes et des déformations internes des tissus au cours des activités journalières de la personne diabétique. Un modèle EF générique du pied a été développé et couplé à une nappe de pression textile. Le dispositif est à même de fournir une estimation des contraintes internes du pied en temps-réel.

Published
2011

43. Jacobian-based repair method for finite element meshes after registration

Author

Nancy Hitschfeld, Yohan Payan, Claudio Lobos, Marek Bucki, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), and Departamento de Ciencias de la Computación (DCC)

Subjects
Mathematical optimization, Finite element method, Registration, 0206 medical engineering, Context (language use), 02 engineering and technology, symbols.namesake, Mesh repair, 0202 electrical engineering, electronic engineering, information engineering, Polygon mesh, Quality improvement, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Mathematics, ComputingMethodologies_COMPUTERGRAPHICS, Partial differential equation, General Engineering, Relaxation (iterative method), [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], 020601 biomedical engineering, Computer Science Applications, Modeling and Simulation, Jacobian matrix and determinant, symbols, 020201 artificial intelligence & image processing, Node (circuits), [SDV.IB]Life Sciences [q-bio]/Bioengineering, Element (category theory), Meshing, Algorithm, Software
Abstract

International audience; Registration methods are used in the meshing field to "adapt" a given mesh to a target domain. Finite element method (FEM) is applied to the resulting mesh to compute an approximate solution to the system of partial differential equations (PDE) representing the physical phenomena under study. Prior to FE analysis the Jacobian matrix determinant must be checked for all mesh elements. The value of this Jacobian depends on the configuration of the element nodes. If it is negative for a given node, the element is invalid and therefore the FE analysis cannot be carried out. Similarly, some elements, although valid, can present poor quality regarding Jacobian-based indicator values, such as the Jacobian ratio. Mesh registration procedures are likely to produce invalid and/or poor quality elements if the Jacobian parameter is ignored. To repair invalid and poor quality elements after mesh registration, we propose a relaxation procedure driven by specific validity and quality energy formulations derived from the Jacobian value. The algorithm first recovers mesh validity and further improves elements quality, focusing primarily on nodes that make the elements invalid or of poor quality. Our novel approach has been developed in the context of non-rigid mesh registration and validated on a data set of 60 clinical cases in the context of orthopaedic and orthognathic hard and soft tissues modelling studies. The proposed repair method achieves a valid state of the mesh and also raises the quality of the elements to a level suitable for commercial FE solvers.

Published
2011

44. La ' Chaussette Intelligente ' TexiSense : un Dispositif pour la Prévention au Quotidien des Ulcères Plantaires de la Personne Diabétique

Author

M.-F. Cannard, Gérard Becquet, Marek Bucki, Nicolas Vuillerme, M.-B. Diot, Yohan Payan, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), S.A.S. Texisense, entreprise, AGeing and IMagery (AGIM), Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Pierre Mendès France - Grenoble 2 (UPMF), Informatique de Sécurité (IDS S.A.), Centre de l'Arche, Centre de l'Arche [PRH Le Mans], Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
030506 rehabilitation, Prévention, Rehabilitation, prévention des ulcères plantaires, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], chaussette intelligente, 03 medical and health sciences, 0302 clinical medicine, Capteur de pression, Modélisation biomécanique, Orthopedics and Sports Medicine, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Ulcères plantaires, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], 0305 other medical science, 030217 neurology & neurosurgery, pied diabétique
Abstract

National audience; Cet article présente un prototype embarqué de prévention des ulcères plantaires fondé sur l'utilisation d'une chaussette textile capable de collecter les pressions exercées autour du pied de la personne diabétique.

Published
2011

45. Finite element speaker-specific face model generation for the study of speech production

Author

Marek Bucki, Yohan Payan, Mohammad Ali Nazari, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), GMCAO, VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Pacific Institute for the Mathematical Sciences (PIMS), and University of Calgary-University of Calgary

Subjects
Models, Anatomic, Speech production, Engineering drawing, Engineering, media_common.quotation_subject, Finite Element Analysis, Biomedical Engineering, Bioengineering, MESH: Algorithms, 01 natural sciences, MESH: Models, Anatomic, 03 medical and health sciences, 0302 clinical medicine, Face model, 0103 physical sciences, Humans, Speech, Computer vision, Quality (business), [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], 010301 acoustics, media_common, ComputingMethodologies_COMPUTERGRAPHICS, MESH: Humans, MESH: Finite Element Analysis, business.industry, MESH: Speech, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], General Medicine, Finite element method, Computer Science Applications, Human-Computer Interaction, Mesh generation, Face (geometry), Face, A priori and a posteriori, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Artificial intelligence, Fe model, business, MESH: Face, 030217 neurology & neurosurgery, Algorithms
Abstract

International audience; In situations where automatic mesh generation is unsuitable, the finite element (FE) mesh registration technique known as mesh-match-and-repair (MMRep) is an interesting option for quickly creating a subject-specific FE model by fitting a predefined template mesh onto the target organ. The irregular or poor quality elements produced by the elastic deformation are corrected by a 'mesh reparation' procedure ensuring that the desired regularity and quality standards are met. Here, we further extend the MMRep capabilities and demonstrate the possibility of taking into account additional relevant anatomical features. We illustrate this approach with an example of biomechanical model generation of a speaker's face comprising face muscle insertions. While taking advantage of the a priori knowledge about tissues conveyed by the template model, this novel, fast and automatic mesh registration technique makes it possible to achieve greater modelling realism by accurately representing the organ surface as well as inner anatomical or functional structures of interest.

Published
2010

46. A fast and robust patient specific Finite Element mesh registration technique: application to 60 clinical cases

Author

Yohan Payan, Marek Bucki, Claudio Lobos, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), GMCAO, VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Pacific Institute for the Mathematical Sciences (PIMS), and University of Calgary-University of Calgary

Subjects
elastic registration, Computer science, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, 02 engineering and technology, Pattern Recognition, Automated, mesh repair, 0302 clinical medicine, Software, Computer vision, Radiological and Ultrasound Technology, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], Patient specific, Computer Graphics and Computer-Aided Design, Finite element method, Radiographic Image Enhancement, mesh generation, Mesh generation, Radiographic Image Interpretation, Computer-Assisted, Computer Vision and Pattern Recognition, Element (category theory), Algorithms, Computation, 0206 medical engineering, Finite Element Analysis, FOS: Physical sciences, Health Informatics, Models, Biological, Sensitivity and Specificity, 03 medical and health sciences, Artificial Intelligence, Humans, Radiology, Nuclear Medicine and imaging, Computer Simulation, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], Representation (mathematics), Simulation, ComputingMethodologies_COMPUTERGRAPHICS, business.industry, Reproducibility of Results, 020601 biomedical engineering, Physics - Medical Physics, Subtraction Technique, Finite Element Method, Artificial intelligence, Medical Physics (physics.med-ph), business, Tomography, X-Ray Computed, 030217 neurology & neurosurgery, Target organ
Abstract

Finite Element mesh generation remains an important issue for patient specific biomechanical modeling. While some techniques make automatic mesh generation possible, in most cases, manual mesh generation is preferred for better control over the sub-domain representation, element type, layout and refinement that it provides. Yet, this option is time consuming and not suited for intraoperative situations where model generation and computation time is critical. To overcome this problem we propose a fast and automatic mesh generation technique based on the elastic registration of a generic mesh to the specific target organ in conjunction with element regularity and quality correction. This Mesh-Match-and-Repair (MMRep) approach combines control over the mesh structure along with fast and robust meshing capabilities, even in situations where only partial organ geometry is available. The technique was successfully tested on a database of 5 pre-operatively acquired complete femora CT scans, 5 femoral heads partially digitized at intraoperative stage, and 50 CT volumes of patients' heads. In the latter case, both skin and bone surfaces were taken into account by the mesh registration process in order to model the face muscles and fat layers. The MMRep algorithm succeeded in all 60 cases, yielding for each patient a hex-dominant, Atlas based, Finite Element mesh with submillimetric surface representation accuracy, directly exploitable within a commercial FE software.

Published
2010

47. Image processing method for estimating a brain shift in a patient

Author

Marek Bucki, Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), and Payan, Yohan

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, finite element model, brain shift, computer assisted surgery, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [INFO.INFO-MO] Computer Science [cs]/Modeling and Simulation, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
Abstract

This patent describes a new methodology to compensate the brain shift during an open neurosurgery.

Published
2010

48. Method for resetting a set of points in images

Author

Marek Bucki, Yohan PAYAN, Payan, Yohan, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)

Subjects
elastic registration, [SDV.IB] Life Sciences [q-bio]/Bioengineering, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], ComputingMilieux_LEGALASPECTSOFCOMPUTING, [INFO.INFO-TI] Computer Science [cs]/Image Processing [eess.IV], computer assisted surgery, [INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV], Data_GENERAL, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], ComputingMethodologies_COMPUTERGRAPHICS
Abstract

This patent describes an elastic 3D registration algorithm developed in the context of computer assisted surgery

Published
2010

49. Procédé pour le recalage d'un ensemble de points dans des images

Author

Marek Bucki, Yohan PAYAN, Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525 (TIMC-IMAG), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Gestes Medico-chirurgicaux Assistés par Ordinateur (TIMC-IMAG-GMCAO), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), and Payan, Yohan

Subjects
[SDV.IB] Life Sciences [q-bio]/Bioengineering, recalage élastique, [SPI.MECA.BIOM] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], matching, [PHYS.MECA.BIOM] Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [SDV.IB]Life Sciences [q-bio]/Bioengineering, [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph]
Published
2008

50. Real-time SPECT and 2D ultrasound image registration

Author

Marek, Bucki, Fabrice, Chassat, Francisco, Galdames, Takeshi, Asahi, Daniel, Pizarro, and Gabriel, Lobo

Subjects
Tomography, Emission-Computed, Single-Photon, Information Storage and Retrieval, Reproducibility of Results, Image Enhancement, Sensitivity and Specificity, Kidney Neoplasms, Pattern Recognition, Automated, Imaging, Three-Dimensional, Artificial Intelligence, Computer Systems, Subtraction Technique, Image Interpretation, Computer-Assisted, Humans, Algorithms, Ultrasonography
Abstract

In this paper we present a technique for fully automatic, real-time 3D SPECT (Single Photon Emitting Computed Tomography) and 2D ultrasound image registration. We use this technique in the context of kidney lesion diagnosis. Our registration algorithm allows a physician to perform an ultrasound exam after a SPECT image has been acquired and see in real time the registration of both modalities. An automatic segmentation algorithm has been implemented in order to display in 3D the positions of the acquired US images with respect to the organs.

Published
2007

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