Electromagnetic Simulation of Signal Distribution of Various RF Endoluminal Loop Geometries with Coil Orientation: Towards a Reconfigurable Design
| العنوان: | Electromagnetic Simulation of Signal Distribution of Various RF Endoluminal Loop Geometries with Coil Orientation: Towards a Reconfigurable Design |
|---|---|
| المؤلفون: | Olivier Beuf, Kevin Tse Ve Koon, Fraser Robb, Henri Souchay, Hamza Raki |
| المساهمون: | RMN et optique : De la mesure au biomarqueur, 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), General Electric Medical Systems [Buc] (GE Healthcare), General Electric Medical Systems, General Electric Healthcare, 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 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), Tse Ve Koon, Kevin |
| المصدر: | 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⟩ |
| بيانات النشر: | HAL CCSD, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Physics, Article Subject, Radiological and Ultrasound Technology, Orientation (computer vision), [SPI.ELEC] Engineering Sciences [physics]/Electromagnetism, Acoustics, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, Radius, Decoupling (cosmology), Signal, [SPI.TRON] Engineering Sciences [physics]/Electronics, Standard deviation, 030218 nuclear medicine & medical imaging, [SPI.TRON]Engineering Sciences [physics]/Electronics, 03 medical and health sciences, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, 0302 clinical medicine, Sampling (signal processing), Region of interest, Electromagnetic coil, 030220 oncology & carcinogenesis, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Radiology, Nuclear Medicine and imaging, Physical and Theoretical Chemistry, Spectroscopy |
| الوصف: | 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 navigation, variations in coil orientation with respect to B0 are bound to occur, leading to impaired image acquisition due to a loss of signal uniformity. In this work, three typical coil orientations encountered during navigation were chosen and the resulting signal uniformity of the different geometries was investigated through the simulatedB1x,y/IRtvalues. Sampling this quantity over a circle of radius r enabled us to calculate the coefficient of variation (= standard deviation/mean) for this given distance. This procedure was repeated forr∈5;15 mm, which represents the region of interest in the colon. Our results show that single-loop and double-layer geometries could provide complementary solutions for improved signal uniformity. Finally, using four microelectromechanical system switches, we proposed the design of a reconfigurable endoluminal coil able to switch between those two geometries while also ensuring the active decoupling of the endoluminal coil during the RF transmission of an MR experiment. |
| وصف الملف: | text/xhtml |
| اللغة: | English |
| تدمد: | 1552-5031 1552-504X |
| DOI: | 10.1155/2021/6614696⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5d55a853e194b09544fc6fe94d2ee83 https://hal.archives-ouvertes.fr/hal-03340041 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....e5d55a853e194b09544fc6fe94d2ee83 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15525031 1552504X |
|---|---|
| DOI: | 10.1155/2021/6614696⟩ |