Short echo time dual-frequency MR Elastography with Optimal Control RF pulses

Autor: Pilar Sango-Solanas, Kevin Tse Ve Koon, Eric Van Reeth, Helene Ratiney, Fabien Millioz, Cyrielle Caussy, Olivier Beuf

Publikováno v: Scientific Reports, Vol 12, Iss 1, Pp 1-12 (2022)

Abstract Magnetic Resonance Elastography (MRE) quantifies the mechanical properties of tissues, typically applying motion encoding gradients (MEG). Multifrequency results allow better characterizations of tissues using data usually acquired through s

Externí odkaz: https://doaj.org/article/d4627aba95724110a7a5dd4835778fca

Serial and Parallel Active Decoupling Characterization Using RF MEMS Switches for Receiver Endoluminal Coils at 1.5 T

Autor: Isabelle Saniour, Fraser Robb, Olivier Beuf, Simon A. Lambert, Kevin Tse Ve Koon, Hamza Raki, Henri Souchay

Publikováno v: IEEE Sensors Journal
IEEE Sensors Journal, 2020, 20 (18), pp.10511-10520. ⟨10.1109/JSEN.2020.2995055⟩
IEEE Sensors Journal, Institute of Electrical and Electronics Engineers, 2020, 20 (18), pp.10511-10520. ⟨10.1109/JSEN.2020.2995055⟩

MEMS (Micro Electro Mechanical System) switches were assessed and compared to PIN diode in fulfilling the task of active decoupling of Receiver Endoluminal Coils (RECs). Three prototype RECs with the PIN diode in parallel ( ${p}$ PIN), MEMS in parall

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3a4d8bbdb137ec8ddad8605cc7c4524
https://doi.org/10.1109/jsen.2020.2995055

Electromagnetic Simulation of Signal Distribution of Various RF Endoluminal Loop Geometries with Coil Orientation: Towards a Reconfigurable Design

Autor: Olivier Beuf, Kevin Tse Ve Koon, Fraser Robb, Henri Souchay, Hamza Raki

Publikováno v: Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering, Wiley, 2021, 2021, pp.1-15. ⟨10.1155/2021/6614696⟩
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering, 2021, 2021, pp.1-15. ⟨10.1155/2021/6614696⟩

With the objective of improving MR endoluminal imaging of the colonic wall, electromagnetic simulations of different configurations of single-layer and double-layer, and double-turn endoluminal coil geometries were run. Indeed, during colon navigatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5d55a853e194b09544fc6fe94d2ee83
https://hal.archives-ouvertes.fr/hal-03340041

Comparison of high-resolution magnetic resonance imaging and micro-computed tomography arthrography for

Autor: Kevin, Tse Ve Koon, Denis, Grenier, Fabrice, Taborik, Anne-Laure, Perrier, Laurent, Mahieu-Williame, Luc, Magnier, Thomas, Chuzel, Hugues, Contamin, Emmanuel, Chereul, Olivier, Beuf

Publikováno v: Quant Imaging Med Surg

BACKGROUND: Non-human primate (NHP) could be an interesting model for osteoarthritis (OA) longitudinal studies but standard medical imaging protocols are not able to acquire sufficiently high-resolution images to depict the thinner cartilage (compare

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::5c5f1862a9193798dc2745d6516407b7
https://pubmed.ncbi.nlm.nih.gov/34341721

Active control of the spatial MRI phase distribution with optimal control theory

Autor: Kevin Tse Ve Koon, Steffen J. Glaser, Dominique Sugny, Elisabeth Brusseau, Hélène Ratiney, Olivier Beuf, Simon A. Lambert, Pauline Lefebvre, Denis Grenier, Eric Van Reeth

Publikováno v: Journal of Magnetic Resonance
Journal of Magnetic Resonance, Elsevier, 2017, 281, pp.82-93. 〈10.1016/j.jmr.2017.05.008〉
Journal of Magnetic Resonance, Elsevier, 2017, 281, pp.82-93. ⟨10.1016/j.jmr.2017.05.008⟩
Journal of Magnetic Resonance, 2017, 281, pp.82-93. ⟨10.1016/j.jmr.2017.05.008⟩

International audience; This paper investigates the use of Optimal Control (OC) theory to design Radio-Frequency (RF) pulses that actively control the spatial distribution of the MRI magnetization phase. The RF pulses are generated through the applic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07345e3f998738042d85733b47252bab
https://doi.org/10.1016/j.jmr.2017.05.008