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Abstract #1509

Evaluating 8-independent channel shimming strategies to drive a 16-channel loop-dipole transceiver body imaging array at 7.0 Tesla

M. Arcan Erturk1,2 and Gregory J. Metzger1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, 2Restorative Therapies Group, Medtronic, Minneapolis, MN, United States

Majority of the installed 7.0T systems have 8-independent transmit channels, therefore additional hardware changes are necessary to fully utilize higher channel count transceiver arrays (i.e. 16-channel loop-dipole body imaging array, 16LD). Here, we investigated three different 8-independent channel phase shimming strategies to drive 16LD and compared against fully independent 16-channel phase-only shimming. 8-independent channel shimming while transmitting power from all 16 array-elements with pre-determined phase difference between loop and dipole elements on the same block causes only about 10% drop in B1+ efficiency compared to 16-independent channel transmit.

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