Magnetic Resonance in Medicine • Vol 90 • No 2
Electromagnetic and <scp>RF</scp> pulse design simulation based optimization of an eight‐channel loop array for 11.7T brain imaging
March 2023 • Son Chu, Vincent Gras, Franck Mauconduit, Aurélien Massire, Nicolas Boulant, G Shajan
Purpose Optimization of transmit array performance is crucial in ultra‐high‐field MRI scanners such as 11.7T because of the increased RF losses and RF nonuniformity. This work presents a new workflow to investigate and minimize RF coil losses, and to choose the optimum coil configuration for imaging. Methods An 8‐channel transceiver loop‐array was simulated to analyze its loss mechanism at 499.415 MHz. A folded‐end RF shield was developed to limit radiation loss and improve the efficiency. The coil element length,…