An Electrically Long Ultra-High Field MRI Volume Body Coil Design

Author(s):  
Sayim Gokyar ◽  
Henning U. Voss ◽  
Fraser Robb ◽  
Douglas J. Ballon ◽  
Simone Angela Winkler
2021 ◽  
Vol 85 (6) ◽  
pp. 3522-3530
Author(s):  
Bei Zhang ◽  
Gregor Adriany ◽  
Lance Delabarre ◽  
Jerahmie Radder ◽  
Russell Lagore ◽  
...  

Bone Reports ◽  
2020 ◽  
Vol 13 ◽  
pp. 100525
Author(s):  
Damien Roche ◽  
Constance Michel ◽  
Pierre Daudé ◽  
Arnaud Le Troter ◽  
Christophe Chagnaud ◽  
...  

NeuroImage ◽  
2018 ◽  
Vol 181 ◽  
pp. 211-218 ◽  
Author(s):  
David J. Schaeffer ◽  
Kevin D. Johnston ◽  
Kyle M. Gilbert ◽  
Joseph S. Gati ◽  
Ravi S. Menon ◽  
...  

2019 ◽  
Vol 30 (1) ◽  
pp. 28-39 ◽  
Author(s):  
Mohamed Mounir El Mendili ◽  
Maria Petracca ◽  
Kornelius Podranski ◽  
Lazar Fleysher ◽  
Sirio Cocozza ◽  
...  

2019 ◽  
Vol 480 ◽  
pp. 154-163 ◽  
Author(s):  
Lenka Kubíčková ◽  
Petr Brázda ◽  
Miroslav Veverka ◽  
Ondřej Kaman ◽  
Vít Herynek ◽  
...  

Author(s):  
Karthik Lakshmanan ◽  
Martijn Cloos ◽  
Ryan Brown ◽  
Riccardo Lattanzi ◽  
Daniel K. Sodickson ◽  
...  

Purpose. To revisit the “loopole,” an unusual coil topology whose unbalanced current distribution captures both loop and electric dipole properties, which can be advantageous in ultra-high-field MRI. Methods. Loopole coils were built by deliberately breaking the capacitor symmetry of traditional loop coils. The corresponding current distribution, transmit efficiency, and signal-to-noise ratio (SNR) were evaluated in simulation and experiments in comparison to those of loops and electric dipoles at 7 T (297 MHz). Results. The loopole coil exhibited a hybrid current pattern, comprising features of both loops and electric dipole current patterns. Depending on the orientation relative to B0, the loopole demonstrated significant performance boost in either the transmit efficiency or SNR at the center of a dielectric sample when compared to a traditional loop. Modest improvements were observed when compared to an electric dipole. Conclusion. The loopole can achieve high performance by supporting both divergence-free and curl-free current patterns, which are both significant contributors to the ultimate intrinsic performance at ultra-high field. While electric dipoles exhibit similar hybrid properties, loopoles maintain the engineering advantages of loops, such as geometric decoupling and reduced resonance frequency dependence on sample loading.


Sign in / Sign up

Export Citation Format

Share Document