Academic Journal
32‐Channel self‐grounded bow‐tie transceiver array for cardiac MR at 7.0T
| العنوان: | 32‐Channel self‐grounded bow‐tie transceiver array for cardiac MR at 7.0T |
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| المؤلفون: | Eigentler, Thomas Wilhelm, Kuehne, Andre, Boehmert, Laura, Dietrich, Sebastian, Els, Antje, Waiczies, Helmar, Niendorf, Thoralf |
| سنة النشر: | 2022 |
| المجموعة: | TU Berlin: Deposit Once |
| مصطلحات موضوعية: | 610 Medizin und Gesundheit, cardiovascular MRI, electrical dipole, parallel imaging, RF coil, transceiver array, ultrahigh field MRI |
| الوصف: | Purpose Design, implementation, evaluation, and application of a 32‐channel Self‐Grounded Bow‐Tie (SGBT) transceiver array for cardiac MR (CMR) at 7.0T. Methods The array consists of 32 compact SGBT building blocks. Transmission field (B1+) shimming and radiofrequency safety assessment were performed with numerical simulations and benchmarked against phantom experiments. In vivo B1+ efficiency mapping was conducted with actual flip angle imaging. The array’s applicability for accelerated high spatial resolution 2D FLASH CINE imaging of the heart was examined in a volunteer study (n = 7). Results B1+ shimming provided a uniform field distribution suitable for female and male subjects. Phantom studies demonstrated an excellent agreement between simulated and measured B1+ efficiency maps (7% mean difference). The SGBT array afforded a spatial resolution of (0.8 × 0.8 × 2.5) mm3 for 2D CINE FLASH which is by a factor of 12 superior to standardized cardiovascular MR (CMR) protocols. The density of the SGBT array supports 1D acceleration of up to R = 4 (mean signal‐to‐noise ratio (whole heart) ≥ 16.7, mean contrast‐to‐noise ratio ≥ 13.5) without impairing image quality significantly. Conclusion The compact SGBT building block facilitates a modular high‐density array that supports accelerated and high spatial resolution CMR at 7.0T. The array provides a technological basis for future clinical assessment of parallel transmission techniques. ; EC/H2020/743077/EU/Thermal Magnetic Resonance: A New Instrument to Define the Role of Temperature in Biological Systems and Disease for Diagnosis and Therapy/ThermalMR ; BMBF, 01QE1815, Verbundprojekt: Seeing is Believing: Revolution der bildgebenden Diagnostik und Therapiekontrolle des Körperstammes durch superaufgelöste Hochfeld-Magnetresonanztomographie; Teilprojekt: Industrielle Forschung und Entwicklung lokaler Radiofrequenz-Antennen für hochauflösende Hochfeld-MRT des Körperstammes |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1522-2594 0740-3194 |
| Relation: | https://depositonce.tu-berlin.de/handle/11303/16614; http://dx.doi.org/10.14279/depositonce-15391 |
| DOI: | 10.14279/depositonce-15391 |
| الاتاحة: | https://depositonce.tu-berlin.de/handle/11303/16614 https://doi.org/10.14279/depositonce-15391 |
| Rights: | This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. ; https://creativecommons.org/licenses/by-nc/4.0/ |
| رقم الانضمام: | edsbas.FD50BC96 |
| قاعدة البيانات: | BASE |
| تدمد: | 15222594 07403194 |
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| DOI: | 10.14279/depositonce-15391 |