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Abstract #1222

A 32-channel loop-dipole transceiver array for body imaging at 7.0 Tesla

M. Arcan Erturk1, Xiaoping Wu1, Gregor Adriany1, Pierre-Francois Van de Moortele1, Edward J Auerbach1, Andrea Grant1, Kamil Ugurbil1, and Gregory J Metzger1

1Radiology, University of Minnesota, Minneapolis, MN, United States

A 32-channel transmit/receive (transceiver) body array (32LD) was developed by combining eight dipole elements with 24 loops, 3 each stacked lengthwise under each dipole. The transmit/receive performance was compared against a 16-channel loop-dipole (16LD) array in numerical simulations and phantom experiments. The 32LD had improved SNR near the surface and enabled accelerations in foot-head dimension as expected. Inside deeply situated organs, SNR of 32LD was comparable to 16LD. Furthermore, the 32LD had ~30% higher local SAR than the 16LD with single-spoke RF shimming inside the kidneys and torso. High channel count body imaging arrays can be developed by combining dipoles and loops with geometric decoupling.

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