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Your search keyword '"Sigovan, Monica"' showing total 16 results
Start Over Author "Sigovan, Monica" Publisher elsevier bv
16 results on '"Sigovan, Monica"'

3. Feasibility of lung imaging with a large field-of-view spectral photon-counting CT system

Author

Si-Mohamed, Salim, primary, Boccalini, Sara, additional, Rodesch, Pierre-Antoine, additional, Dessouky, Riham, additional, Lahoud, Elias, additional, Broussaud, Thomas, additional, Sigovan, Monica, additional, Gamondes, Delphine, additional, Coulon, Philippe, additional, Yagil, Yoad, additional, Boussel, Loïc, additional, and Douek, Philippe, additional

Published
2021
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5. Simultaneous assessment of microcalcifications and morphological criteria of vulnerability in carotid artery plaque using hybrid 18F-NaF PET/MRI

Author

Mechtouff, Laura, primary, Sigovan, Monica, additional, Douek, Philippe, additional, Costes, Nicolas, additional, Le Bars, Didier, additional, Mansuy, Adeline, additional, Haesebaert, Julie, additional, Bani-Sadr, Alexandre, additional, Tordo, Jérémie, additional, Feugier, Patrick, additional, Millon, Antoine, additional, Luong, Stéphane, additional, Si-Mohamed, Salim, additional, Collet-Benzaquen, Diane, additional, Canet-Soulas, Emmanuelle, additional, Bochaton, Thomas, additional, Crola Da Silva, Claire, additional, Paccalet, Alexandre, additional, Magne, David, additional, Berthezene, Yves, additional, and Nighoghossian, Norbert, additional

Published
2020
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9. Review of an initial experience with an experimental spectral photon-counting computed tomography system

Author

UCL - (SLuc) Service de radiologie, UCL - SSS/IREC/IMAG - Pôle d'imagerie médicale, Si-Mohamed, Salim, Bar-Ness, Daniel, Sigovan, Monica, Cormode, David P., Coulon, Philippe, Coche, Emmanuel, Vlassenbroek, Alain, Normand, Gabrielle, Boussel, Loic, Douek, Philippe, UCL - (SLuc) Service de radiologie, UCL - SSS/IREC/IMAG - Pôle d'imagerie médicale, Si-Mohamed, Salim, Bar-Ness, Daniel, Sigovan, Monica, Cormode, David P., Coulon, Philippe, Coche, Emmanuel, Vlassenbroek, Alain, Normand, Gabrielle, Boussel, Loic, and Douek, Philippe

Abstract

Spectral photon-counting CT (SPCCT) is an emerging X-ray imaging technology that extends the scope of available diagnostic imaging tools. The main advantage of photon-counting CT technology is better sampling of the spectral information from the transmitted spectrum in order to benefit from additional physical information being produced during matter interaction, including photo-electric and Compton effects, and the K-edge effect. The K-edge, which is specific for a given element, is the increase in X-ray absorption of the element above the binding energy between its inner electronic shell and the nucleus. Hence, the spectral information contributes to better characterization of tissues and materials of interest, explaining the excitement surrounding this area of X-ray imaging. Other improvements of SPCCT compared with conventional CT, such as higher spatial resolution, lower radiation exposure and lower noise are also expected to provide benefits for diagnostic imaging. In this review, we describe multi-energy CT imaging, from dual energy to photon counting technology, and our initial experience results using a clinical-scale spectral photon counting CT (SPCCT) prototype system in vitro and in vivo. In addition, possible clinical applications are introduced.

Published
2017

15. Comparison of free breathing 3D mDIXON with single breath-hold 3D inversion recovery sequences for the assessment of Late Gadolinium Enhancement

Author

Monica Sigovan, Philippe Douek, Salim Si-Mohamed, Sara Boccalini, Riham Dessouky, Vincenzo De Stasio, Thomas Broussaud, 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), Sigovan, Monica, 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), and Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Adult, Male, Wilcoxon signed-rank test, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, Contrast Media, Gadolinium, 030204 cardiovascular system & hematology, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, Imaging, Three-Dimensional, 0302 clinical medicine, Image Interpretation, Computer-Assisted, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, High spatial resolution, medicine, Humans, Late gadolinium enhancement, Radiology, Nuclear Medicine and imaging, ComputingMilieux_MISCELLANEOUS, Aged, 3d inversion, medicine.diagnostic_test, business.industry, Magnetic resonance imaging, General Medicine, Single breath, Middle Aged, Image Enhancement, Magnetic Resonance Imaging, Female, business, Nuclear medicine, Free breathing, Kappa
Abstract

To evaluate the technical and diagnostic performance of three dimensional (3D) mDIXON versus 3D inversion recovery (3D VIAB) and 3D spectral presaturation with inversion recovery (3D SPIR) late gadolinium enhancement (LGE) sequences.A total of 78 patients (50 males and 28 females, age 49 ± 18 years) with 1.5 T CMR examination including three different 3D LGE sequences (3D mDIXON, 3D VIAB, and 3D SPIR) were evaluated for technical and diagnostic performance by two readers. Qualitative scores and quantitative signal and contrast-to-noise ratios were compared among sequences. Qualitative comparisons were made using Friedman and Wilcoxon signed rank tests. Quantitative comparisons were made using one way ANOVA. Reader agreements were tested using Cohen's Kappa. Any p-value0.05 was significant.19 out of 78 patients (24 %) were excluded due to poor (grade 4) image quality and 29 patients were excluded due to absence of LGE. For the remaining 30 patients, free breathing 3D mDIXON showed higher confidence in diagnosis of subepicardial LGE (p-value0.05). 3D mDIXON outperformed 3D SPIR in both visualization of LGE (p = 0.02) and quality of fat suppression (p = 0.001). Nevertheless, 3D mDIXON showed lower image quality compared to the other two sequences.Free breathing 3D mDIXON is a diagnostic problem-solving tool, especially when making a diagnosis of subepicardial enhancement and/or fat suppression is needed, owing to its high spatial resolution and robust fat suppression. Choice of 3D LGE sequence should be based on patient's breath-hold ability, diagnostic needs, and institutional availability considering the strengths and limitations of each sequence.

Published
2021
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16. Focal nodular hyperplasia and hepatocellular adenoma: The value of shear wave elastography for differential diagnosis

Author

Jean-Yves Mabrut, Christian Ducerf, Loic Boussel, Agnès Rode, Aymeric Guibal, Brigitte Bancel, Camille Boularan, Thomas Brunel, Hôpital de la Croix-Rousse [CHU - HCL], Hospices Civils de Lyon (HCL), 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 et modélisation Vasculaires, Thoraciques et Cérébrales (MOTIVATE), 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), and Sigovan, Monica

Subjects
Adult, Male, medicine.medical_specialty, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Contrast Media, Adenoma, Liver Cell, Diagnosis, Differential, Lesion, Elasticity Imaging Techniques, medicine, Humans, Radiology, Nuclear Medicine and imaging, Prospective Studies, Elasticity (economics), business.industry, Liver Neoplasms, Ultrasound, Focal nodular hyperplasia, Reproducibility of Results, General Medicine, Middle Aged, Hepatocellular adenoma, Image Enhancement, medicine.disease, Magnetic Resonance Imaging, [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, Liver, ROC Curve, Focal Nodular Hyperplasia, Female, Radiology, Differential diagnosis, medicine.symptom, business, Contrast-enhanced ultrasound
Abstract

[DOI:\hrefhttps://dx.doi.org/10.1016/j.ejrad.2015.07.02910.1016/j.ejrad.2015.07.029] [PubMed:\hrefhttps://www.ncbi.nlm.nih.gov/pubmed/2629932326299323]; This study assessed the clinical usefulness of shear wave elastography (SWE) during ultrasound for differentiating between focal nodular hyperplasias (FNHs) and hepatocellular adenomas (HAs).\ SWE was performed on 56 patients presenting with 76 liver lesions (57 FNHs and 19HAs) that were confirmed by MRI and contrast-enhanced ultrasound (CEUS) (n=55) or by histology (n=21). A mean elasticity value was obtained for each lesion. The ratios of the elasticity of the lesions to the elasticity of the surrounding liver were determined. The optimal elasticity cut-off value for distinguishing between the two lesion types was determined using ROC analysis. All lesions that were classified as "undetermined" after CEUS were reclassified using the elasticity values.\ The mean elasticity value was 46.99 ± 31.15 kPa for FNHs and 12.08 ± 10.68 kPa for HAs (p

Published
2015
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