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146 results on '"imagerie_ultrasonore"'

1. Broadband Reduction of the Second Harmonic Distortion During Nonlinear Ultrasound Wave Propagation

Author: Mike Danilouchkine, Olivier Basset, Christian Cachard, Nico de Jong, Guillaume Matte, Mirza Pasovic, Antonius F.W. van der Steen, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Cardiothoracic Surgery, and Cardiology
Subjects: Acoustics and Ultrasonics, Acoustics, Transducers, Physics::Medical Physics, Biophysics, Phase (waves), Contrast Media, imagerie_ultrasonore, Optics, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Waveform, Radiology, Nuclear Medicine and imaging, ComputingMilieux_MISCELLANEOUS, Ultrasonography, Physics, Total harmonic distortion, Microbubbles, Radiological and Ultrasound Technology, Phantoms, Imaging, business.industry, Signal Processing, Computer-Assisted, Image Enhancement, Imagerie Ultrasonore, reseau_international, Nonlinear distortion, Harmonics, Discrete frequency domain, Harmonic, Imaging Signal, business
Abstract: Ultrasound contrast harmonic imaging and detection techniques are hampered by the harmonic distortion of the ultrasound wave caused by the nonlinearities of the medium. To increase the discrimination between the tissue and ultrasound contrast agents at higher harmonics, we investigate a tissue harmonic suppression technique. The main attention of the research is the signal that is introduced at the source and is constructed out of several discrete frequency components from the second harmonic band. Therefore, this method was coined as the multiple component second harmonic reduction signal or multiple component SHRS. By adjusting the amplitude and phase of discrete components and simultaneously propagating multiple component SHRS with the imaging signal, the nonlinear distortion of the ultrasound waveform is considerably reduced. Using the numerical simulation, the optimal parameters for multiple component SRHS were deduced. The simulations results were corroborated in the water tank experiments and showed 40 dB reduction with respect to the fundamental, covering up to 75% of the entire second harmonic band. In the other series of experiments with the clinically used contrast agent, the uniform increase in agent-to-tissue ratio of 7.4 dB over a relatively large region of imaging was observed. The use of the proposed method in the everyday clinical practice can improve discrimination between the tissue and the contrast agent in harmonic imaging. ( E-mail: mirza.pasovic@creatis.insa-lyon.fr) (C) 2010 World Federation for Ultrasound in Medicine & Biology.
Published: 2010
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2. Estimation of the viscoelastic properties of vessel walls using a computational model and Doppler ultrasound

Author: Alejandro F. Frangi, Piero Tortoli, Enrico Boni, Guy Courbebaisse, Olivier Basset, Christian Cachard, Simone Balocco, Computer Vision Center (Centre de visio per computador) (CVC), Universitat Autònoma de Barcelona (UAB), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Imagerie et modélisation Vasculaires, Thoraciques et Cérébrales (MOTIVATE), Microelectronic Systems Design Laboratory - Università di Firenze, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III [Madrid] (ISC)-ministerio de ciencia e innovacion, Institució Catalana de Recerca i Estudis Avançats (ICREA), Center for Computational Imaging and Simulation Technologies in Biomedicine (CISTIB), Universitat Pompeu Fabra [Barcelona] (UPF), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Universitat Pompeu Fabra
Subjects: Sistema cardiovascular -- Malalties, Artèries -- Malalties, Physics::Medical Physics, Constitutive equation, Reference data (financial markets), 030204 cardiovascular system & hematology, 01 natural sciences, Physics::Fluid Dynamics, Viscosity, 0302 clinical medicine, ARMA parameter fitting, 010301 acoustics, ComputingMilieux_MISCELLANEOUS, Espagne, Radiological and Ultrasound Technology, Phantoms, Imaging, Mechanics, Imagerie Ultrasonore, reseau_international, categₘixte, France, Standard linear solid model, Materials science, Quantitative Biology::Tissues and Organs, imagerie_ultrasonore, Models, Biological, Terms—Viscoelasticity, Imaging phantom, Viscoelasticity, 03 medical and health sciences, Approximation error, 0103 physical sciences, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Humans, Computer Simulation, Radiology, Nuclear Medicine and imaging, Sensitivity (control systems), Simulation, Arterial wall model, Italie, Computational Biology, Ultrasonography, Doppler, Elasticity, Regional Blood Flow, Noninvasive measurement, Blood Vessels, Aterosclerosi
Abstract: Human arteries affected by atherosclerosis are characterized by altered wall viscoelastic properties. The possibility of noninvasively assessing arterial viscoelasticity in vivo would significantly contribute to the early diagnosis and prevention of this disease. This paper presents a noniterative technique to estimate the viscoelastic parameters of a vascular wall Zener model. The approach requires the simultaneous measurement of flow variations and wall displacements, which can be provided by suitable ultrasound Doppler instruments. Viscoelastic parameters are estimated by fitting the theoretical constitutive equations to the experimental measurements using an ARMA parameter approach. The accuracy and sensitivity of the proposed method are tested using reference data generated by numerical simulations of arterial pulsation in which the physiological conditions and the viscoelastic parameters of the model can be suitably varied. The estimated values quantitatively agree with the reference values, showing that the only parameter affected by changing the physiological conditions is viscosity, whose relative error was about 27% even when a poor signal-to-noise ratio is simulated. Finally, the feasibility of the method is illustrated through three measurements made at different flow regimes on a cylindrical vessel phantom, yielding a parameter mean estimation error of 25%. This work has been partially funded by the Industrial and Technological Development Centre (CDTI) within the CENIT Programme (CDTEAM Project), the EC @neurIST (IST-FP6-2004-027703) projects, by BQR INSA-Lyon and by the Italian/nMinistry of University & Research (COFIN-PRIN 2005).
Published: 2010
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3. Segmentation of ultrasound images––multiresolution 2D and 3D algorithm based on global and local statistics

Author: Olivier Basset, J. Alison Noble, Atilla Baskurt, Djamal Boukerroui, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Basset, Olivier
Subjects: Computer science, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Scale-space segmentation, imagerie_volumique, imagerie_ultrasonore, Wavelet, Artificial Intelligence, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, medicine, Segmentation, Breast ultrasound, ComputingMilieux_MISCELLANEOUS, Adaptive algorithm, medicine.diagnostic_test, business.industry, Segmentation-based object categorization, Images et Modèles, Pattern recognition, Image segmentation, Imagerie Ultrasonore, Signal Processing, Computer Vision and Pattern Recognition, Artificial intelligence, business, Algorithm, Software
Abstract: In this paper, we propose a robust adaptive region segmentation algorithm for noisy images, within a Bayesian framework. A multiresolution implementation of the algorithm is performed using a wavelets basis and can be used to process both 2D and 3D data. In this work we focus on the adaptive character of the algorithm and we discuss how global and local statistics can be utilised in the segmentation process. We propose an improvement on the adaptivity by introducing an enhancement to control the adaptive properties of the segmentation process. This takes the form of a weighting function accounting for both local and global statistics, and is introduced in the minimisation. A new formulation of the segmentation problem allows us to control the effective contribution of each statistical component. The segmentation algorithm is demonstrated on synthetic data, 2D breast ultrasound data and on echocardiographic sequences (2D + T). An evaluation of the performance of the proposed algorithm is also presented. © 2002 Elsevier Science B.V. All rights reserved.
Published: 2003
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4. Investigating elastic properties of soft biological tissues

Author: Didier Vray, Philippe Delachartre, Nicolas Rognin, Elisabeth Brusseau, Jérémie Fromageau, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Materials science, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Iterative method, Acoustics, Finite Element Analysis, Biomedical Engineering, Young's modulus, Coronary Artery Disease, imagerie_ultrasonore, 030204 cardiovascular system & hematology, Models, Biological, 01 natural sciences, Weight-Bearing, 03 medical and health sciences, symbols.namesake, 0302 clinical medicine, 0103 physical sciences, Axial strain, Image Processing, Computer-Assisted, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, medicine, Humans, Elasticity (economics), 010301 acoustics, Scaling, Ultrasonography, lumiereₚaroi_vasculaire, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Signal processing, medicine.diagnostic_test, Phantoms, Imaging, business.industry, Ultrasound, General Medicine, Elasticity, Imagerie Ultrasonore, Carotid Arteries, imagerieₘorphologique_fonctionnelle, Connective Tissue, symbols, Stress, Mechanical, Elastography, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Algorithms
Abstract: We have developed a signal processing technique to map the axial strain distribution occurring in a medium exposed to a mechanical compression with RF ultrasound signals. This method is based on an adaptive and iterative estimation of local scaling factors, via the exploitation of phase information.
Published: 2002
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5. Synthetic aperture-based beam compression for intravascular ultrasound imaging

Author: M. Krueger, K. Schroeder, Didier Vray, T. Rastello, Gérard Gimenez, Elisabeth Brusseau, C. Haas, Helmut Ermert, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Synthetic aperture radar, Acoustics and Ultrasonics, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Computer science, Computation, Transducers, Image processing, Iterative reconstruction, imagerie_ultrasonore, Grating, symbols.namesake, Optics, Intravascular ultrasound, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, medicine, Humans, Computer Simulation, Electrical and Electronic Engineering, Instrumentation, Ultrasonography, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Fourier Analysis, medicine.diagnostic_test, Phantoms, Imaging, business.industry, Models, Cardiovascular, Signal Processing, Computer-Assisted, Coronary Vessels, Imagerie Ultrasonore, reseau_international, Fourier transform, symbols, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Beam (structure)
Abstract: In this paper, intravascular ultrasound (IVUS) images acquired with a 64-element array transducer using a multistatic acquisition scheme are presented. The images are reconstructed from a collection of pulse-echo measurements using a synthetic aperture array imaging technique. The main limitations of IVUS imaging are a poor lateral resolution and elevated grating lobes caused by the imaging geometry. We propose a Synthetic Aperture Focusing Technique (SAFT), which uses a limited number of A-scan signals. The focusing process, which is performed in the Fourier domain, requires far less computation time than conventional delay-and-sum methods. Two different reconstruction kernel functions have been derived and are compared for the processing of experimental data.
Published: 2001
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6. Effects of muscle texture on ultrasonic measurements

Author: Philippe Delachartre, Béatrice Buquet, P Berge, Olivier Basset, Krzysztof Suchorski, J. Culioli, Said Abouelkaram, Station de recherches sur la viande, Institut National de la Recherche Agronomique (INRA), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and ProdInra, Migration
Subjects: Materials science, 030309 nutrition & dietetics, Wave propagation, Mineralogy, imagerie_ultrasonore, Analytical Chemistry, 03 medical and health sciences, [SDV.IDA]Life Sciences [q-bio]/Food engineering, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Bovine muscle, Texture (crystalline), Chemical composition, ComputingMilieux_MISCELLANEOUS, 0303 health sciences, Parametric Image, Attenuation, 0402 animal and dairy science, 04 agricultural and veterinary sciences, General Medicine, [SDV.IDA] Life Sciences [q-bio]/Food engineering, 040201 dairy & animal science, Intensity (physics), Imagerie Ultrasonore, Ultrasonic sensor, Food Science, Biomedical engineering
Abstract: In this study bovine muscle samples were analysed using an ultrasonic method to investigate the influence of compositional and textural characteristics on ultrasonic measurements. The ultrasonic method was based on the measurement of acoustic parameters (velocity, attenuation and backscattering intensity) which are closely related to physical properties of the propagating medium. An examination of physical parameters was proposed by two types of representations: a mean profile and a parametric image. Two muscle types, which differ in composition and structure were studied. On the same samples additional measurements, mechanical resistance and chemical composition, were performed and used to show the influence of meat composition and texture on ultrasonic data.
Published: 2000
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7. Time-frequency representation of multicomponent chirp signals

Author: Philippe Delachartre, Didier Vray, Gérard Gimenez, Ning Ma, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Ambiguity function, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Speech recognition, Representation (systemics), Bilinear interpolation, Chirp spread spectrum, imagerie_ultrasonore, Signal, Imagerie Ultrasonore, Distribution (mathematics), Time–frequency representation, Control and Systems Engineering, Signal Processing, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Chirp, Computer Vision and Pattern Recognition, Electrical and Electronic Engineering, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Algorithm, Software, Mathematics
Abstract: This work deals with the analysis of chirp signals by means of time-frequency representation. We propose a chirp adapted time-frequency representation (CA) in which the interferences are significantly reduced. This method is applied to the analysis of acoustic echoes of a sphere target. Comparison of the results to other types of time-frequency distribution of the Cohen's class shows that the identification of the signal features with CA representation is clearer than with other types of bilinear time-frequency distributions.
Published: 1997
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8. Double pulse inversion imaging for ultrasound contrast imaging

Author: Olivier Basset, Aymeric Guibal, Adeline Bernard, Francois Varray, Fanglue Lin, Christian Cachard, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Plateforme d'Imagerie Multimodale LyonTech (PILoT)
Subjects: Physics, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, business.industry, Wave propagation, Acoustics, Labex CELYA, Ultrasound, imagerie_ultrasonore, Contrast imaging, Double pulse, Ultrasonic imaging, Imagerie Ultrasonore, Optics, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Region of interest, Harmonics, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Ultrasonic propagation, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience; In ultrasound contrast imaging, many techniques based on multiple transmissions have been proposed to increase the contrast-to-tissue ratio (CTR). They are generally based on the response of static scatterers inside the imaged region. However, scatterer motion, for example in blood vessels, has an inevitable influence on multi-pulse techniques, which can either enhance or degrade the technique involved. This paper investigates the response of static nonlinear media insonated by multi-pulses with various phase shifts, and the influence of scatterer motion on multi-pulse techniques. Simulations and experimental results from a single bubble and clouds of bubbles show that the phase shift of the echoes backscattered from bubbles is dependent on the transmissions' phase shift, and that the bubble motion influences the efficiency of multi-pulse techniques: fundamental and second-harmonic amplitudes of the processed signal change periodically, exhibiting maximum or minimum values, according to scatterer motion. Furthermore , experimental results based on the second-harmonic inversion (SHI) technique reveal that bubble motion can be taken into account to regulate the pulse repetition frequency (PRF). With the optimal PRF, the CTR of SHI images can be improved by about 12 dB compared with second-harmonic images.
Published: 2012
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9. Influences of Bubble Motion to Second Harmonic Inversion Imaging

Author: Jacopo Viti, Francois Varray, Fanglue Lin, Olivier Basset, Christian Cachard, Francesco Guidi, R. Mori, Key Laboratory of Molecular Virology & Immunology (LMVI), Institut Pasteur de Shanghai, Académie des Sciences de Chine - Chinese Academy of Sciences (IPS-CAS), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, Pulse repetition frequency, Motion compensation, Wave propagation, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Acoustics, Bubble, Labex CELYA, Second-harmonic imaging microscopy, imagerie_ultrasonore, Imagerie Ultrasonore, reseau_international, Amplitude, Italy, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Harmonics, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, High harmonic generation, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: In ultrasound contrast harmonic imaging, the generated harmonics during wave propagation in tissues lead to a limited contrast-to-tissue ratio (CTR). Second-harmonic inversion (SHI), based on two 90° phase-shifted transmissions with the same frequencies and amplitudes, can effectively reduce the tissue-harmonic signals and improve CTR. However, the bubbles motion strongly influences the SHI effectiveness. Therefore, in-vitro experiments on circulating UCA were conducted to quantify the influence of moving bubbles to SHI technique, by regulating the pulse repetition frequency (PRF), in order to guarantee and to optimize the SHI technique. Experimental results show that when bubbles move in axial direction, the second-harmonic amplitudes exhibits an oscillating evolution with increasing bubbles motions. The maximum improvement reaches 12 dB when compared to SHI without bubbles motion. The influence of lateral bubbles motion is much less than the influence of axial bubbles motion.
Published: 2012
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10. Longitudinal displacement of the carotid wall and cardiovascular risk factors: associations with aging, adiposity, blood pressure and periodontal disease independent of cross-sectional distensibility and intima-media thickness

Author: Mark Bartold, David S. Celermajer, Lisa Jamieson, Kostas Kapellas, André Sérusclat, Michael R. Skilton, Guillaume Zahnd, Djhianne Alibay, Philippe Moulin, Kerin O'Dea, Didier Vray, Louise J. Maple-Brown, Marion Durand, Alex Brown, Zahnd, Guillaume, Vray, Didier, Serusclat, Andre, Alibay, Djhianne, Bartold, Mark, Brown, Alex, Durand, Marion, Jamieson, Lisa M, Kapellas, Kostas, Maple-Brown, Louise J, O'Dea, Kerin, Moulin, Philippe, Celermajer, David S, Skilton, Michael R, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Hopital Cardio-Thoracique et Vasculaire Louis Pradel, Hôpital Louis Pradel [CHU - HCL], Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Université Henri Poincaré - Nancy 1 (UHP), Australian Research Centre for Population Oral Health, School of Dentistry, University of Adelaide, Menzies School of Health Research [Australia], Charles Darwin University, Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), The University of Sydney, Boden Institute of Obesity, Nutrition, Exercise and Eating Disorders, University of Technology Sydney (UTS), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), University of Adelaide, Charles Darwin University [Australia], and Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Male, cardiovascular risk factors, Aging, Longitudinal study, Acoustics and Ultrasonics, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Labex CELYA, periodontal disease, Blood Pressure, Comorbidity, 030204 cardiovascular system & hematology, Carotid Intima-Media Thickness, Labex PRIMES, 030218 nuclear medicine & medical imaging, motion estimation, 0302 clinical medicine, Risk Factors, Carotid artery disease, Prevalence, Common carotid artery, Pulse wave velocity, ComputingMilieux_MISCELLANEOUS, Adiposity, education.field_of_study, Radiological and Ultrasound Technology, Middle Aged, 3. Good health, Imagerie Ultrasonore, reseau_international, Carotid Arteries, arterial stiffness, speckle tracking, Cardiovascular Diseases, Female, categₘixte, Radiology, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Adult, medicine.medical_specialty, Population, Biophysics, imagerie_ultrasonore, Risk Assessment, 03 medical and health sciences, Age Distribution, Elastic Modulus, medicine.artery, reseau_internationnal, medicine, Humans, Radiology, Nuclear Medicine and imaging, education, Periodontal Diseases, longitudinal displacement, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], business.industry, carotid artery, segmentation, Australia, Australie, medicine.disease, Blood pressure, Intima-media thickness, b-mode ultrasound, Arterial stiffness, Vascular Resistance, atherosclerosis, business
Abstract: The recently discovered longitudinal displacement of the common carotid arterial wall (i.e., the motion along the same plane as the blood flow), may be associated with incident cardiovascular events and represents a novel and relevant clinical information. At present, there have only been a few studies that have been conducted to investigate this longitudinal movement. We propose here a method to assess noninvasively the wall bi-dimensional (two-dimensional [2-D], cross-sectional and longitudinal) motion and present an original approach that combines a robust speckle tracking scheme to guidance by minimal path contours segmentation. Our method is well suited to large clinical population studies as it does not necessitate strong imaging prerequisites. The aim of this study is to describe the association between the longitudinal displacement of the carotid arterial wall and cardiovascular risk factors, among which periodontal disease. Some 126 Indigenous Australians with periodontal disease, an emerging risk factor, and 27 healthy age- and sex-matched non-indigenous control subjects had high-resolution ultrasound scans of the common carotid artery. Carotid intima-media thickness and arterial wall 2-D motion were then assessed using our method in ultrasound B-mode sequences. Carotid longitudinal displacement was markedly lower in the periodontal disease group than the control group (geometric mean (IQR): 0.15 mm (0.13) vs. 0.42 mm (0.30), respectively; p < 0.0001), independent of cardiovascular risk factors, cross-sectional distensibility and carotid intima-media thickness (p < 0.0001). A multivariable model indicated that the strongest correlates of carotid longitudinal displacement in adults with periodontal disease were age (β-coefficient = -.235, p = .03), waist (β-coefficient = -.357, p = 0.001), and pulse pressure (β-coefficient = .175, p = 0.07), independent of other cardiovascular risk factors, cross-sectional distensibility and pulse wave velocity. Carotid longitudinal displacement, estimated with our approach, is impaired in the periodontal disease group, independent of established cardiovascular risk factors and other noninvasive measures of arterial stiffness, and may represent an important marker of cardiovascular risk. Refereed/Peer-reviewed
Published: 2012
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11. Longitudinal displacement of the carotid wall and cardiovascular risk factors: associations with aging, adiposity, blood pressure and periodontal disease independent of cross-sectional distensibility and intima-media thickness

Author: Zahnd, G., Vray, D., Sérusclat, A., Alibay, D., Bartold, M., Durand, M., Jamieson, L., Kapellas, K., Maple-Brown, L., O\textquoterightDea, K., Moulin, Philippe, Celermajer, D., Skilton, M., Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Hopital Cardio-Thoracique et Vasculaire Louis Pradel, Hôpital Louis Pradel [CHU - HCL], Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique (LHEEA), École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National de la Recherche Agronomique (INRA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hospices Civils de Lyon (HCL)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, reseau_international, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Labex CELYA, reseau_internationnal, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, categₘixte, Australie, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, Labex PRIMES
Abstract: International audience
Published: 2012

12. Affine phase based motion estimation applied to echocardiography

Author: Adrian Basarab, Florian Douziech, Olivier Bernard, Herve Liebgott, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Computer science, Mathematical analysis, Phase (waves), reseauₙational, 02 engineering and technology, imagerie_ultrasonore, 01 natural sciences, Ultrasonic imaging, Imagerie Ultrasonore, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Motion estimation, 0103 physical sciences, categₛt2i, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Affine transformation, Radio frequency, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 010301 acoustics, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2011
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13. Intramural shear strain can highlight the presence of atherosclerosis: A clinical in vivo study

Author: Loic Boussel, André Sérusclat, Didier Vray, Guillaume Zahnd, Service de Radiologie [Hôpital de la Croix-Rousse - HCL], Hôpital de la Croix-Rousse [CHU - HCL], Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Hopital Cardio-Thoracique et Vasculaire Louis Pradel, Hôpital Louis Pradel [CHU - HCL], Imagerie Ultrasonore, and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Carotid ultrasound, medicine.medical_specialty, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Significant difference, Stiffness, imagerie_ultrasonore, Imagerie Coeur - Vaisseaux - Poumons, Ultrasonic imaging, Imagerie Ultrasonore, Older patients, In vivo, Internal medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Shear stress, medicine, Cardiology, categₘixte, Radiology, medicine.symptom, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: Intramural Shear Strain (ISS), the angular deformation of the arterial tissues within the depth of the wall, can be assessed by estimating the wall longitudinal motion at different depth. This study investigates the association between risk factors of early-stage atherosclerosis (age and diabetes) with the longitudinal motion of the wall, compared to classical markers such as radial distensibility and intima-media thickness, in carotid ultrasound B-mode sequences. Our previously developed Contour and Speckle Tracking (CST) method is applied in vivo to estimate the wall 2D trajectory and calculate motion and stiffness parameters. A novel method to evaluate the ISS is then introduced and applied. Fourteen young volunteers, 14 older volunteers and 14 older diabetic patients were involved in this study. Results show a significant difference in the longitudinal displacement index between both healthy groups and the older patients (p
Published: 2011
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14. 4D simulation of nonlinear pressure field propagation on GPU with the angular spectrum method

Author: Olivier Basset, Christian Cachard, Francois Varray, Piero Tortoli, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Acoustics, Labex CELYA, Graphics processing unit, nonlinear simulation, imagerie_ultrasonore, Pressure field, inhomogeneous nonlinear parameter, Ultrasonic imaging, Harmonic analysis, Angular spectrum method, Imagerie Ultrasonore, reseau_international, Nonlinear system, Nonlinear acoustics, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Kernel (image processing), categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, nonlinear propagation, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2011
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15. Fourier Domain and High Frame Rate based Elastography for Breast Nodules Investigation

Author: Alessandro Ramalli, Olivier Basset, Stefano Ricci, Jacopo Nori, Christian Cachard, Elisabetta Giannotti, Roberto Tarquini, D. Abdulcadir, Piero Tortoli, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS), and CERFACS
Subjects: medicine.medical_specialty, Materials science, medicine.diagnostic_test, Cancer, imagerie_ultrasonore, Fourier imaging, medicine.disease, medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Elastography, Radiology, High frame rate, Breast nodules, Fourier domain, ComputingMilieux_MISCELLANEOUS, Biomedical engineering
Abstract: International audience
Published: 2011

16. Using a geometric formulation of annular-like shape priors for constraining variational level-sets

Author: Martino Alessandrini, Olivier Basset, Denis Friboulet, Thomas Dietenbeck, Olivier Bernard, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Images et Modèles
Subjects: ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Context (language use), Image processing, imagerie_ultrasonore, Artificial Intelligence, Prior probability, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Segmentation, Computer vision, ComputingMilieux_MISCELLANEOUS, Mathematics, business.industry, Images et Modèles, Image segmentation, Function (mathematics), Computational geometry, Ultrasonic imaging, Imagerie Ultrasonore, reseau_international, Signal Processing, Computer Vision and Pattern Recognition, Artificial intelligence, business, Algorithm, Software
Abstract: In this paper we address the segmentation of images exhibiting annular like shapes which may be approximated by two elliptical contours. Such patterns are indeed recurrent in many image processing applications. In this context, we develop a level-set framework specifically dedicated to the detection of annular shapes. Thanks to a fast solution to the least-squares fitting problem of similar patterns, our model handles the segmentation task efficiently with a single level-set function. The behavior of this approach is illustrated on images from various fields. An evaluation is then performed for the myocardium detection in MRI and ultrasound cardiac images.
Published: 2011
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17. Nonlinear Parameter Imaging to Characterize HIFU Ablation: in vitro Results in Porcine Liver

Author: Varray, F., Chenot, J., Basset, O., Tortoli, P., Lima, D., Cachard, C., Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Imagerie Ultrasonore, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Labex CELYA, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, reseauₙational, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2011
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18. Second harmonic inversion for ultrasound contrast harmonic imaging

Author: Pasovic, M., Danilouchkine, M., Van Neer, P., Cachard, C., Van Der Steen, A.F.W., Basset, Olivier, De Jong, N., Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], reseau_international, Labex CELYA, nouvelle_equipe_3, categ_st2i, imagerie_ultrasonore, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract: International audience; Résumé à insérer
Published: 2011

19. 2D matrix array optimization by simulated annealing for 3D hepatic imaging

Author: Bakary Diarra, Piero Tortoli, Christian Cachard, Herve Liebgott, Direction de le météorologie (DMN), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: medicine.medical_specialty, Main lobe, Computer science, Matrix Array, Acoustics, imagerie_ultrasonore, Imagerie Ultrasonore, Sparse array, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Simulated annealing, medicine, Radiology, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: In this paper we present a preliminary study of a 2D sparse array design technique. The probe is intended to be suitable for needle tacking during hepatic biopsy and therapy applications. It can also be used in other micro-tools or internal organs operations. The probe is composed of 1024 elements (64x16). Due to this huge number of elements, the sparse array technique is used to reasonably reduce this number and to make possible its connection to the recent scanners. The simulated annealing algorithm permits to optimize elements coefficients and their positions to have a better beam pattern. The features of the probe must satisfy the geometrical constraints imposed by the targeted applications as well as some users defined imaging characteristics. Several simulations are made to know the acoustical characteristics of the array and its convenience to needle detection operations. Combining sparse array and optimization algorithm we reduce the initial element number to 267 with good imaging features: the sidelobes level is maintained to – 40 dB, the lateral main lobe width at -6 dB is 1.1 mm and the elevation main lobe width is 4.4 mm.
Published: 2011
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20. Experimental Implementation of the Second Harmonic Inversion Imaging on an Open Ultrasonic Scanner

Author: Aymeric Guibal, Olivier Basset, Francois Varray, Fanglue Lin, Christian Cachard, Key Laboratory of Molecular Virology & Immunology (LMVI), Institut Pasteur de Shanghai, Académie des Sciences de Chine - Chinese Academy of Sciences (IPS-CAS), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, Scanner, business.industry, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Acoustics, Labex CELYA, Inversion (meteorology), imagerie_ultrasonore, Ultrasonic imaging, Harmonic analysis, Imagerie Ultrasonore, Optics, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Ultrasonic sensor, Radio frequency, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2011
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21. Estimation locale de fréquence à l\textquoterightaide du rapport de filtres de Gabor

Author: Blanchard, R., Brusseau, E., Basset, O., Grenier, D., Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Imagerie Ultrasonore, Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and RMN et optique : De la mesure au biomarqueur
Subjects: Méthodes et systèmes en IRM et optique, Imagerie Ultrasonore, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, imagerie_RMNₒptique, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2011

22. Extensions of Nonlinear B/A parameter imaging methods for echo mode

Author: Francois Varray, Christian Cachard, Olivier Basset, Piero Tortoli, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université de Florence, and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: Diffraction, Engineering, Acoustics and Ultrasonics, Acoustics, Labex CELYA, Contrast Media, imagerie_ultrasonore, 01 natural sciences, Models, Biological, Harmonic analysis, Nonlinear acoustics, 0103 physical sciences, Image Processing, Computer-Assisted, Humans, nouvelle_equipe_3, Electrical and Electronic Engineering, 010301 acoustics, Instrumentation, Ultrasonography, 010302 applied physics, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Estimation theory, business.industry, Phantoms, Imaging, Echo (computing), Mode (statistics), Signal Processing, Computer-Assisted, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Nonlinear system, reseau_international, Nonlinear Dynamics, Female, Ultrasonography, Mammary, Estimation methods, business, Algorithm, Algorithms
Abstract: International audience; This paper investigates nonlinear B/A parameter imaging in ultrasound echo mode. First, the B/A estimation methods which can be extended to echo mode are identified. The finite amplitude approaches are found to be excellent candidates to assess the nonlinear parameter because of their experimental simplicity, supported by a strong mathematical background. Second, three nonlinear coefficient measurement methods, thus far proposed for applications in homogeneous media, are extended to heterogeneous media. In particular, the simulations show that the extended comparative method (ECM) offers the best results when the probe diffraction effects are taken into consideration. The first experimental images obtained by applying the ECM for two different phantoms are also presented, showing the feasibility of B/A imaging.
Published: 2011
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23. A compensative model for the angle-dependence of motion estimates in non-invasive vascular elastography

Author: Mercure, E., Deprez, J.F., Fromageau, J., Basset, O., Soulez, G., Cloutier, G., Maurice, R.L., Joint Department of Physics, titute of Cancer Research and Royal Marsden Hospital, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratory of Biorheology and Medical Ultrasonics (LBUM), and Université de Montréal (UdeM)-Hospital Research Center
Subjects: Canada, Imagerie Ultrasonore, reseau_international, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2011

24. Fundamental and second-harmonic ultrasound field computation of inhomogeneous nonlinear medium with a generalized angular spectrum method

Author: Christian Cachard, Olivier Basset, Piero Tortoli, Francois Varray, Alessandro Ramalli, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université de Florence, and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)
Subjects: Acoustics and Ultrasonics, Field (physics), Computation, Acoustics, Labex CELYA, imagerie_ultrasonore, 01 natural sciences, 030218 nuclear medicine & medical imaging, Harmonic analysis, 03 medical and health sciences, 0302 clinical medicine, Nonlinear acoustics, Nonlinear medium, 0103 physical sciences, Image Processing, Computer-Assisted, nouvelle_equipe_3, Electrical and Electronic Engineering, 010301 acoustics, Instrumentation, Ultrasonography, Physics, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Phantoms, Imaging, Mathematical analysis, Reproducibility of Results, categ_st2i, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Angular spectrum method, Nonlinear system, reseau_international, Nonlinear Dynamics, Harmonic, Algorithms
Abstract: International audience; The simulation of nonlinear propagation of ultra-sound waves is typically based on the Kuznetsov-Zabolotskaya-Khokhlov equation. A set of simulators has been proposed in the literature but none of them takes into account a possible spatial 3-D variation of the nonlinear parameter in the investigated medium. This paper proposes a generalization of the angular spectrum method (GASM) including the spatial variation of the nonlinear parameter. The proposed method computes the evolution of the fundamental and second-harmonic waves in four dimensions (spatial 3-D and time). For validation purposes, the one-way fields produced by the GASM are first compared with those produced by established reference simu-lators and with experimental one-way fields in media with a homogeneous nonlinear parameter. The same simulations are repeated for media having an axial variation of the nonlinear parameter. The mean errors estimated in the focal region are less than 4.0% for the fundamental and 5.4% for the second harmonic in all cases. Finally, the fundamental and second-harmonic fields simulated for media having nonlinear parameter variations in the axial, lateral, and elevation directions, which cannot be simulated with other currently available methods, are presented. The new approach is also shown to yield a reduction in computation time by a factor of 13 with respect to the standard nonlinear simulator.; Résumé à insérer
Published: 2011
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25. Imagerie ultrasonore de contraste avec transducteurs capacitifs micro-usinés

Author: Guillaume Ferin, Dominique Certon, Olivier Basset, Ayache Bouakaz, Vermon S.A., GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) (GREMAN - UMR 7347), Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Basset, Olivier, Université de Tours-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Imagerie Ultrasonore, 0103 physical sciences, Biomedical Engineering, Biophysics, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, reseauₙational, imagerie_ultrasonore, 010301 acoustics, 01 natural sciences, ComputingMilieux_MISCELLANEOUS
Abstract: Resume Dans cette etude, nous proposons d’exploiter les qualites de la technologie des transducteurs capacitifs micro-usines (CMUT) et les avantages qu’offrent les microbulles de contraste ultrasonore en developpant une technique simple et efficace pour l’evaluation precoce de la reponse therapeutique, un element determinant pour le pronostic du cancer. L’approche est basee sur le developpement de nouvelles methodes d’imagerie de contraste et une nouvelle generation de technologie de sonde CMUT. Ainsi, une sonde CMUT dediee a l’imagerie harmonique de contraste a ete concue et caracterisee. Le prototype contient 128 elements centres a 5 MHz et a ete evalue en exploitant une nouvelle approche d’imagerie de contraste basee sur les non-linearites des microbulles. Les resultats demontrent l’utilite de la combinaison des sondes CMUT et des methodes d’imagerie non lineaire pour ameliorer la sensibilite et la specificite de l’imagerie ultrasonore de contraste.
Published: 2011

26. Use of the instantaneous frequency to investigate the time-dependent velocity of a continuously insonified target

Author: Gerard Gimenez, Christian Cachard, Didier Vray, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Acoustics, Doppler radar, imagerie_ultrasonore, Instantaneous phase, law.invention, symbols.namesake, law, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Electronic engineering, Acoustic Doppler velocimetry, Electrical and Electronic Engineering, Mathematics, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Angular frequency, Frequency deviation, Radial velocity, Imagerie Ultrasonore, Control and Systems Engineering, Signal Processing, symbols, Computer Vision and Pattern Recognition, Analytic signal, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Doppler effect, Software
Abstract: When a continuous wave of constant frequency is intercepted by a moving target, the Doppler frequency (difference between radiated and transmitted frequencies) is constant if the radial velocities (with respect to the transmitter and the receiver) are constant. When this is not the case the Doppler frequency is time-dependent. In this work the concept of instantaneous frequency, related to the analytic signal associated to the received signal, is recalled and applied to delayed signals. It is pointed out that the instantaneous angular frequency of the complex envelope of the received signal is simply the derivative of the delay. Moreover, this frequency is the usual Doppler frequency when the received signal is produced by a moving target. These results are then used to relate the Doppler frequency to the radial velocity in various situations. Finally, the case of a solid ball moving at constant velocity (time-varying radial velocity) is studied in greater detail and possible application to the mapping of an acoustic field is investigated.
Published: 1993
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27. Nonlinear radio frequency image simulation for harmonic imaging: Creanuis

Author: Piero Tortoli, Francois Varray, Christian Cachard, Olivier Basset, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Acoustics, imagerie_ultrasonore, Signal, Harmonic analysis, Imagerie Ultrasonore, Radio propagation model, Nonlinear system, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Harmonic, High harmonic generation, Probability distribution, Radio frequency, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: The linear propagation of ultrasound in media is an approximation of reality and current ultrasound image simulators do not take into account the nonlinear behaviour of the propagation. This article proposes a new tool, CREANUIS, which associates the nonlinear propagation theory to arbitrary scatterer distributions to create nonlinear radio frequency images. The amplitude distribution of the radio frequency or envelope signal obtained with the new tool follows the expected statistical distribution. The resulting data contains the fundamental but also the second harmonic information and provides realistic images that can be useful for the development of new acoustic imaging techniques.
Published: 2010
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28. Improved resolution for ultrasound Fourier imaging

Author: Herve Liebgott, Pierre Gueth, Olivier Basset, Remy Blanchard, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, medicine.medical_specialty, business.industry, Acoustics, Resolution (electron density), Plane wave, imagerie_ultrasonore, Frame rate, Spectral imaging, Angular spectrum method, Imagerie Ultrasonore, symbols.namesake, Transverse plane, Fourier transform, Optics, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, categₛt2i, symbols, medicine, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Image resolution, ComputingMilieux_MISCELLANEOUS
Abstract: Ultrasound Fourier imaging was first initiated by Jian-yu Lu during the 90's. Using this method, one can compute an ultrasound image using a single emission, allowing a very high frame rate (up to 10000 frames per second). The main limitation of this method is the presence of geometrical artifacts, which tend to reduce the image resolution. In this study, we propose to use steered plane waves in reception instead of spherical waves as in [1]. This helps sampling the non-null part of the ultrasound spectrum with finer resolution, while reducing the presence of artifacts. A plane wave is emitted. Back-scattered signals are measured using multiple steered plane waves. Those signals 1D spectrum contain spatial information merged to create the 2D ultrasound image spectrum. Due to axial modulation, this 2D spectrum features 2 symmetric lobes. The image resolution increases when using plane waves instead of spherical waves because the sampling of these lobes is easier. The PSF size is measured both in simulation and experimentally for each method. For conventional imaging technique, this size is 155 by 311µm in axial and transverse directions. Standard Fourier imaging leads to a size of 156 by 279µm. With our spectral imaging, this size is 154µm in axial direction and 252µm in transverse direction. Using steered plane wave in a Fourier imaging framework increases the beamformed image resolution, especially in the transverse direction when compared to other beamforming methods.
Published: 2010
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29. Estimation de paramètres mécaniques de la paroi carotidienne par imagerie ultrasonore in vivo pour la détection précoce de comportements pathologiques

Author: Zahnd, G., Marion, A., Sérusclat, A., Durand, M., Boussel, L., Vray, D., Centre de Recherche et d'Application en Traitement de l'Image et du Signal ( CREATIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Hopital Cardio-Thoracique et Vasculaire Louis Pradel, Hôpital Louis Pradel [CHU - HCL], Hospices Civils de Lyon ( HCL ) -Hospices Civils de Lyon ( HCL ), Société Française d'Acoustique - SFA, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Leclere, Quentin, Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Service de génétique médicale, CHU Strasbourg-Hôpital de Hautepierre [Strasbourg], Service de Radiologie [Hôpital de la Croix-Rousse - HCL], Hôpital de la Croix-Rousse [CHU - HCL], and Imagerie Ultrasonore
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Athérosclérose, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [ SPI.ACOU ] Engineering Sciences [physics]/Acoustics [physics.class-ph], imagerie_ultrasonore, Carotide, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, Échographie, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Ultrasons, [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]
Abstract: National audience; Les maladies cardiovasculaires représentent la première cause de mortalité dans les pays industrialisés. Il est donc important d'effectuer un diagnostic précoce, préférentiellement de manière non invasive, pour traiter une vaste population. Les propriétés mécaniques des artères, notamment la carotide, sont affectées par l'athérosclérose, et sont considérées comme de bons indicateurs d'une manifestation pathologique précoce. Le comportement de la paroi de la carotide au long du cycle cardiaque présente plusieurs phénomènes particuliers dont l'analyse par imagerie ultrasonore permet de remonter aux causes pathologiques. Ce travail s'intéresse à l'étude conjointe de ces paramètres mécaniques au long d'une séquence d'images échographiques. Nous considérons principalement la force de cisaillement longitudinale exercée par le sang sur la paroi, l'onde de pouls causée par l'effet de dilatation-contraction radiale, et la compression élastique des couches de l'artère. Notre approche trouve son originalité dans le fait qu'elle prend en compte conjointement plusieurs paramètres mécaniques obtenus in vivo et se destine prioritairement à une application clinique pratique pouvant fournir une aide au diagnostic. Les séquences d'images ultrasonores traitées sont des coupes longitudinales de la carotide commune acquises avec un échographe clinique. Nous effectuons une analyse spatio-temporelle en considérant que le mouvement de chaque point de la paroi est continu dans le temps et dans l'espace. Le déplacement est estimé précisément grâce à un algorithme de mise en correspondance de blocs déformables. En fonction des paramètres à estimer pour l'étude du déplacement des couches de la carotide, les tailles de blocs et de noyau utilisés sont déterminées de manière optimale. Un comportement pathologique peut finalement être détecté à partir des paramètres extraits en comparaison de la déformation attendue d'une artère saine.
Published: 2010

30. Fourier domain beamforming for transverse oscillations

Author: Herve Liebgott, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Beamforming, Physics, business.industry, Frequency band, Acoustics, Astrophysics::Instrumentation and Methods for Astrophysics, imagerie_ultrasonore, Window function, Speckle pattern, Transverse plane, symbols.namesake, Imagerie Ultrasonore, Optics, Fourier transform, Apodization, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, symbols, categₛt2i, Time domain, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: Transverse Oscillations (TO) is the name given to a technique able to produce ultrasound images with oscillations in both axial and lateral directions. Such images have shown their potential for improving motion estimation. In this paper we present an alternative to Time Domain Transverse Oscillations (TDTO) beamforming. Conventional approaches to TO use Fraunhoffer approximation to design their beamformer, which is not respected for broadband signals. We propose to proceed to a Fourier Transform of the raw Rf signals before apodization in order to separate the contribution of each frequency band and adapt the apodization function to each frequency. This method is refered to as Fourier Domain Transverse Oscillations (FDTO) beamforming. FDTO is validated by simulations on PSFs obtained with FDTO and TDTO. Their comparison shows higher normalized cross-correlation with FDTO than TDTO for expected transverse oscillations wavelength between 1 and 2.5 mm in our configuration. FDTO is also validated on a speckle phantom. Visually FDTO PSFs, PSFs and specke images 2D spectra have lost the diagonal orientation of their pattern.
Published: 2010
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31. Compressive sensing for raw RF signals reconstruction in ultrasound

Author: Denis Friboulet, Rémy Prost, Herve Liebgott, Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Imagerie Ultrasonore
Subjects: Physics, business.industry, Acoustics, Images et Modèles, Iterative reconstruction, Sparse approximation, imagerie_ultrasonore, Imaging phantom, symbols.namesake, Imagerie Ultrasonore, Wavelet, Fourier transform, Compressed sensing, Fourier analysis, symbols, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Computer vision, Radio frequency, Artificial intelligence, business, ComputingMilieux_MISCELLANEOUS
Abstract: We address in this paper the feasibility of the recent compressive sensing (CS) technique for raw RF signals reconstruction in medical ultrasound. Successful CS reconstruction implies selecting a basis where the signal to be recovered has a sparse expansion. RF signals represent a specific challenge, because their oscillatory nature does not easily lend itself to a sparse representation. In that perspective, we propose to use the recently introduced directional wave atoms [1], which shows good properties for sparsely representing warped oscillatory patterns. Experiments were performed on simulated RF data from a cyst numerical phantom. CS reconstruction was applied to subsampled RF data, by removing 50% to 90% of the original samples. Reconstruction using wave atoms were compared to reconstruction obtained from Fourier and Daubechies wavelets. The obtained accuracies were in the range [0.4–4.0].10−3, [0.2–2.8].10−3 and [0.1–1.7].10−3, using wavelets, Fourier and wave atoms respectively, showing the superiority of the wave atoms representation, and the feasibility of CS for the reconstruction of US RF data.
Published: 2010
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32. Model Fitting using RANSAC for Surgical Tool Localization in 3D Ultrasound Images

Author: Jan Kybic, Herve Liebgott, Marian Uhercik, Christian Cachard, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Center for Machine Perception, Czech Technical University in Prague (CTU), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Computer science, RANSAC, computer.software_genre, 030218 nuclear medicine & medical imaging, 0302 clinical medicine, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Voxel, Computer vision, Breast, ComputingMilieux_MISCELLANEOUS, Ultrasonography, medicine.diagnostic_test, Phantoms, Imaging, Ultrasound, Interventional radiology, Hydrogels, Thresholding, Imagerie Ultrasonore, Surgery, Computer-Assisted, Needles, Ultrasound imaging, Female, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Algorithms, Cryogels, Breast biopsy, Turkeys, Meat, Biomedical Engineering, Image processing, imagerie_ultrasonore, Imaging phantom, 03 medical and health sciences, Imaging, Three-Dimensional, Biopsy, medicine, categₛt2i, Animals, Humans, Computer Simulation, Electrodes, Models, Statistical, business.industry, Ultrasonic imaging, Polyvinyl Alcohol, Artificial intelligence, business, Surgical interventions, computer, 030217 neurology & neurosurgery
Abstract: Ultrasound guidance is used for many surgical interventions such as biopsy and electrode insertion. We present a method to localize a thin surgical tool such as a biopsy needle or a microelectrode in a 3-D ultrasound image. The proposed method starts with thresholding and model fitting using random sample consensus for robust localization of the axis. Subsequent local optimization refines its position. Two different tool image models are presented: one is simple and fast and the second uses learned a priori information about the tool's voxel intensities and the background. Finally, the tip of the tool is localized by finding an intensity drop along the axis. The simulation study shows that our algorithm can localize the tool at nearly real-time speed, even using a MATLAB implementation, with accuracy better than 1 mm. In an experimental comparison with several alternative localization methods, our method appears to be the fastest and the most robust one. We also show the results on real 3-D ultrasound data from a PVA cryogel phantom, turkey breast, and breast biopsy.
Published: 2010
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33. Bimodality Ultrasound/Optical Imaging:Registration and 2D/3D Visualization

Author: Bernhardt, S., Boutet, J., Duboeuf, F., Laidevant, A., Dinten, J.M., Vray, D., Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

34. Blood flow evaluation in high-frequency, 40 MHz imaging: a comparative study of four vector velocity estimation methods

Author: Marion, A., Aoudi, W., Basarab, A., Delachartre, Philippe, Vray, D., Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Imagerie Ultrasonore
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Published: 2010

35. Quaternionic Spatiotemporal Filtering for Dense Motion Field Estimation in Ultrasound Imaging

Author: Didier Vray, Adrien Marion, Patrick Girard, Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), RMN et optique : De la mesure au biomarqueur, and Imagerie Ultrasonore
Subjects: Mean squared error, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, lcsh:TK7800-8360, imagerie_ultrasonore, lcsh:Telecommunication, symbols.namesake, Motion estimation, lcsh:TK5101-6720, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Computer vision, Image resolution, Decorrelation, Mathematics, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], business.industry, Orientation (computer vision), lcsh:Electronics, Imagerie Ultrasonore, Motion field, Flow (mathematics), symbols, Artificial intelligence, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Doppler effect
Abstract: Blood motion estimation provides fundamental clinical information to prevent and detect pathologies such as cancer. Ultrasound imaging associated with Doppler methods is often used for blood flow evaluation. However, Doppler methods suffer from shortcomings such as limited spatial resolution and the inability to estimate lateral motion. Numerous methods such as block matching and decorrelation-based techniques have been proposed to overcome these limitations. In this paper, we propose an original method to estimate dense fields of vector velocity from ultrasound image sequences. Our proposal is based on a spatiotemporal approach and considers 2D+t data as a 3D volume. Orientation of the texture within this volume is related to velocity. Thus, we designed a bank of 3D quaternionic filters to estimate local orientation and then calculate local velocities. The method was applied to a large set of experimental and simulated flow sequences with low motion ( 1 mm/s) within small vessels ( 1 mm). Evaluation was conducted with several quantitative criteria such as the normalized mean error or the estimated mean velocity. The results obtained show the good behaviour of our method, characterizing the flows studied.
Published: 2010

36. Imagerie du paramètre de non linéarité par une méthode comparative en échographie médicale faisabilité expérimentale

Author: Varray, F., Pasovic, M., Cachard, C., Tortoli, P., Basset, O., Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Imagerie Ultrasonore, reseau_international, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

37. Motion estimation using prebeamformed ultrasound signals

Author: Pierre Gueth, Philippe Delachartre, Herve Liebgott, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, Mean squared error, medicine.diagnostic_test, Acoustics, imagerie_ultrasonore, Frame rate, Displacement (vector), Imaging phantom, Transverse plane, Imagerie Ultrasonore, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Motion estimation, Displacement field, medicine, categₛt2i, Elastography, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: In many cases, motion information about tissue or organs carries relevant information to complete the diagnosis based on ultrasound imaging (e.g. elastography, CFM, heart motion analysis etc.). Often, the displacement has a very small amplitude, for example when estimating motion of slow moving flow or when the frame rate is very high. In this study, we propose a method adapted to very small displacement estimation, about 1/10 of the wavelength. This method is inspired by multi-beam methods. It uses multiple 1D displacements along prebeamformed signals, which are then recombined to estimate the 2D displacement. Other multi-beam techniques are based on a small number of 1D estimations. Using more 1D estimations strongly improves the precision of the estimated displacement field. The estimation is done in two steps: 1D displacements are estimated along prebeamformed signals focused around the point of interest. 1D displacements are then recombined to form the 2D displacement using a motion model. We show that 1D displacements are projections of the real displacement of the point. The method is validated both experimentally on a large set of translated phantom. In both simulation and experimental cases, we show that our method leads to an average 1µm × 100nm mean error along transverse and axial direction, compared to 5µm × 1µm along transverse and axial direction for classical speckle-tracking method.
Published: 2010
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38. A new user-independent in vivo method for 2D motion estimation of the carotid wall by ultrasound imaging for early detection of pathological behavior

Author: Zahnd, G., Marion, A., Sérusclat, A., Moulin, Philippe, Durand, M., Boussel, L., Vray, D., Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Hopital Cardio-Thoracique et Vasculaire Louis Pradel, Hôpital Louis Pradel [CHU - HCL], Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National de la Recherche Agronomique (INRA), Service de génétique médicale, CHU Strasbourg-Hôpital de Hautepierre [Strasbourg], Service de Radiologie [Hôpital de la Croix-Rousse - HCL], Hôpital de la Croix-Rousse [CHU - HCL], Imagerie Ultrasonore, Vray, Didier, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hospices Civils de Lyon (HCL)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, categₘixte, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience
Published: 2010

39. Acoustic nonlinearity parameter of tissue on echo mode: review and evaluation of the different approaches for B/A imaging

Author: Olivier Basset, Francois Varray, Christian Cachard, Mirza Pasovic, Piero Tortoli, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, Diffraction, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Bioacoustics, Acoustics, Echo (computing), imagerie_ultrasonore, Harmonic analysis, Imagerie Ultrasonore, reseau_international, Nonlinear system, Nonlinear acoustics, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Distortion, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Radio frequency, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: The nonlinear B/A parameter induces the distortion of ultrasound waves in tissue. Media with different nonlinear parameter differently distort the ultrasound wave. This paper reviews the techniques that allow to compute this parameter in echo mode imaging. For non homogeneous B/A medium, new formulations are proposed. The simulation results show the capacity of all methods to accurately compute the B/A parameter when diffraction effects of the probe are set off, while only the comparative method works nicely when diffraction is taken into account. First experimental results are also presented, confirming the good performance obtainable with such method.
Published: 2009
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40. 2D velocity estimation based on Wigner-Ville distribution with swept-scan imaging system

Author: Li-Liu, Y., Marion, A., Vray, D., Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, reseau_international, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Published: 2009

41. Formation de champ de déplacements à partir des signaux bruts. Application à l\'imagerie ultrasonore en synthèse d\'ouverture

Author: Gueth, P., Liebgott, H., Delachartre, Philippe, Liebgott, Hervé, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Imagerie Ultrasonore, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, categₛt2i, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience
Published: 2009

42. Bi-modality imaging of an ultrasound and optical tissue-mimicking phantom for prostate cancer diagnostic

Author: Boutet, J., Saroul, L., Debourdeau, M., HervÉ, L., Guyon, L., Dinten, J.M., Peltié, P., Vray, D., Rizo, P., Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Imagerie Ultrasonore, Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, reseauₙational, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2009

43. Needle localization methods in 3D ultrasound data

Author: Uhercik, M., Liebgott, H., Kybic, J., Cachard, C., Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Center for Machine Perception, Czech Technical University in Prague (CTU), Liebgott, Hervé, and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Imagerie Ultrasonore, reseau_international, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, categₛt2i, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience
Published: 2009

44. Line Filtering for Detection of Microtools in 3D Ultrasound Data

Author: Herve Liebgott, Jan Kybic, Marian Uhercik, Christian Cachard, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Center for Machine Perception, Czech Technical University in Prague (CTU), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Computer science, RANSAC, imagerie_ultrasonore, computer.software_genre, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Voxel, 0103 physical sciences, Medical imaging, medicine, categₛt2i, Computer vision, 3D ultrasound, 010301 acoustics, ComputingMilieux_MISCELLANEOUS, Line filter, medicine.diagnostic_test, business.industry, Imagerie Ultrasonore, reseau_international, Artificial intelligence, business, computer, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Shape analysis (digital geometry)
Abstract: We propose a robust method for localization of elongated surgical tools in 3D ultrasound data based on shape analysis. The tubular structures in input data are enhanced by a line filter in the pre-processing phase. A new model of a surgical tool appearance in 3D ultrasound image is proposed which exploits its tubular shape. The tool axis is estimated with robust model fitting using a randomized RANSAC procedure. The tool model requires the voxels close to the axis to have a high intensity, high tubularness, and the local principal directions to be consistent with the tool axis. The visual contrast of the tool can be enhanced four-fold using line filtering. We demonstrate that classification rate is improved by 25–40% when adding the tubularness attribute. The comparison to other state-of-the-art localization methods shows that the proposed method is the most robust for data with high level of noise at the expense of additional time for pre-processing (less than 10 seconds for volume of size 53×71×260 voxels).
Published: 2009
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45. Ultrasound and optical tissue-mimicking phantom for bi-modality imaging of prostate cancer diagnosis

Author: Boutet, J., Saroul, L., Debourdeau, M., HervÉ, L., Guyon, L., Dinten, J.M., Peltié, P., Vray, D., Rizo, P., Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Imagerie Ultrasonore, Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Imagerie Ultrasonore, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, reseauₙational, imagerie_ultrasonore, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2009

46. In vivo examination of human lipomas with freehand elastography - Preliminary results

Author: Olivier Basset, Elisabeth Brusseau, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: medicine.medical_specialty, medicine.diagnostic_test, Computer science, Cancer, Image processing, Context (language use), imagerie_ultrasonore, medicine.disease, Ultrasonic imaging, Imagerie Ultrasonore, In vivo, medicine, Ultrasound elastography, Medical imaging, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Radiology, Elastography, Ex vivo, ComputingMilieux_MISCELLANEOUS, Biomedical engineering, Image compression
Abstract: In the context of ultrasound elastography, we recently developed a 2D strain estimation method to image the deformation of a medium during its compression with the probe. This technique was proved to provide good-quality strain images with data acquired in a freehand configuration on elastography-dedicated phantoms and ex vivo dog tissue lesions. In this study, the application to in vivo human benign tumors is presented. The initial results obtained demonstrate that our method is able to provide easily interpretable deformation images in clinical conditions.
Published: 2009

47. Influence of the transducer geometry on the phase of the signal used for reducing second harmonic during ultrasound propagation

Author: A.F.W. van der Steen, Olivier Basset, Christian Cachard, N. de Jong, Guillaume Matte, Mirza Pasovic, Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Remspace Inc., Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Physics, business.industry, Acoustics, Phase (waves), imagerie_ultrasonore, Signal, Harmonic analysis, Imagerie Ultrasonore, reseau_international, Optics, Transducer, Harmonics, categₛt2i, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Harmonic, Ultrasonic sensor, Imaging Signal, business, ComputingMilieux_MISCELLANEOUS
Abstract: Ultrasound contrast harmonic imaging is one of the most used contrast detection method in common system used for diagnostic. Its success comes from the higher non linearity properties of ultrasound contrast agents compared to tissue. A way to further enhance agent to tissue ratio would be to locally suppress second harmonic that is generated due to non linear propagation in tissue. Reducing higher harmonics from surrounding medium is a challenge that has been previously studied. Christopher proposed to transmit inverted replica of back propagated signal, Krishnan, back propagated only second harmonic and added inverted replica of it to excitation, Shen proposed transmitting third harmonic to reduce the second harmonic. In our study, a custom made dual frequency phased array transducer, is used to transmit 2 different signals: the imaging signal and the Second Harmonic Reduction Signal (SHRS). In this paper we study the what is optimal phase PhiSHRS 0 of SHRS needed to achieve a maximum 2nd harmonic frequency reduction in a region of interest, depending upon the several properties of transducer apertures.We have observed that as the size of the transducer and focal distance changes, also the optimal phase of the signal used for reducing the 2nd harmonic changes. If the phase of the signal is inappropriate, increase of the 2nd harmonic can be observed rather than decrease.
Published: 2008
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48. Texture analysis of ultrasound liver images with contrast agent to characterize the fibrosis stage

Author: Christian Cachard, François Duboeuf, Elisabeth Brusseau, B. Delhay, J.P. Tasu, Olivier Basset, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: medicine.medical_specialty, business.industry, media_common.quotation_subject, Ultrasound, Feature extraction, labₐucun, reseauₙational, imagerie_ultrasonore, Biology, medicine.disease, Imagerie Ultrasonore, Liver disease, Image texture, Fibrosis, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, medicine, Contrast (vision), categₘixte, Radiology, Stage (cooking), business, Perfusion, ComputingMilieux_MISCELLANEOUS, Biomedical engineering, media_common
Abstract: The present work proposes to identify the liver fibrosis stage from a characterization of the perfusion using ultrasound images. A liver disease leads to changes in the organ perfusion that can be emphasized on ultrasound images by injecting contrast agent. In the evolution of the disease, 5 stages are usually defined and a visual evaluation of these stages is often difficult. We propose to characterize the evolution of the perfusion when the contrast agent is injected from image texture analysis and ultrasound tissue characterization techniques. To validate this approach, a set of 18 sequences of liver images at different pathological stages is used. The sequences represent at the beginning the liver without contrast agent and about 20 s later the contrast agent is fully distributed in the tissue. A window of homogeneous tissue is extracted each second for processing. 38 features were involved in the statistical analysis. The results show that the texture analysis of images corresponding to the fully distributed contrast agent is more relevant to identify the stage of fibrosis than the features characterizing the evolution of the texture. In particular, a classification of the samples in two classes (the 2 highest pathological grades versus the 3 lowest) exhibits a sensitivity of about 80 % and a specificity of about 60 %. The statistical significance was set to p
Published: 2008
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49. Multi-resolution parallel integral projection for fast localization of a straight electrode in 3D ultrasound images

Author: Jan Kybic, Christian Cachard, Herve Liebgott, Marian Uhercik, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Center for Machine Perception, Czech Technical University in Prague (CTU), Imagerie Ultrasonore, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Breast biopsy, Computer science, 0206 medical engineering, Straight electrode, 02 engineering and technology, imagerie_ultrasonore, computer.software_genre, 030218 nuclear medicine & medical imaging, Upsampling, 03 medical and health sciences, 0302 clinical medicine, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Voxel, Pyramid, categₛt2i, medicine, Mammography, Computer vision, 3D ultrasound, Pyramid (image processing), ComputingMilieux_MISCELLANEOUS, medicine.diagnostic_test, business.industry, Integral transform, 020601 biomedical engineering, Imagerie Ultrasonore, reseau_international, Artificial intelligence, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, computer
Abstract: We address the problem of fast and accurate localization of miniature surgical instruments like needles or electrodes using 3D ultrasound (US). An algorithm based on maximizing a parallel integral transform (PIP) can automatically localize line-shaped objects in 3D US images with accuracy on the order of hundreds of micrometers. Here we propose to use a multi-resolution to accelerate the algorithm significantly. We use a maximum function for downsampling to preserve the high intensity voxels of a thin electrode. We integrate the multi-resolution pyramid into a hierarchical mesh-grid search of PIP. The experiments with a tissue mimicking phantom and breast biopsy data show that proposed method works well on real US images. The speed-up is threefold compared to original PIP method with the same accuracy 0.4 mm. A further speed-up up to 16 times is reached by an early stopping of the optimization, at the expense of some loss of accuracy.
Published: 2008
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50. 3D strain imaging method dedicated to large deformations and freehand scanning

Author: Deprez, J.F., Brusseau, E., Basset, O., Basset, Olivier, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)
Subjects: Imagerie Ultrasonore, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, categₛt2i, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, imagerie_ultrasonore, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2008

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