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Abstract #4395

An improved 32-channel loop-dipole transceiver array design for body imaging at 7.0 Tesla: Simulation study

M. Arcan Erturk1, Xiaoping Wu1, Gregor Adriany1, Russell L Lagore1, Kamil Ugurbil1, and Gregory J Metzger1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

An improved 32-channel transmit/receive (transceiver) body array (32LD) is designed by combining eight fractionated dipole elements with 24 loops, 3 each stacked lengthwise above each dipole. Performance of the 32LD is compared against a 16-channel loop-dipole (16LD) array through numerical modeling/simulations around the pelvis and torso of a male human model. The 32LD has ~10% SNR gain in deep centrally located tissues (prostate), >20% gain in medium-depth imaging targets (kidneys) and >30% near the surface. The 32LD has improved field-uniformity, higher transmit efficiency, comparable SAR to 16LD with phase-only RF shimming; and improved excitation fidelity with multi-band parallel transmit pulses.

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