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Abstract #1999

Anatomical NeuroImaging with Single and Parallel Transmission at Ultra-high Field: A Comparison of Image Quality and User Experience 

Samantha J Ma1, Chenyang Zhao1, Kai Wang1, Xingfeng Shao1, Soroush Heidari Pahlavian1, Farshid Sepehrband1, Kay Jann1, Lirong Yan1, and Danny JJ Wang1
1University of Southern California, Los Angeles, CA, United States

B1+ field inhomogeneity is an ongoing issue that plagues whole-brain anatomical imaging at ultra-high field, hindering its translation to the clinic. This work evaluates and compares the latest commercially available options for RF shimming using NOVA 1Tx/32Rx and parallel 8Tx/32Rx coil systems. Various configurations including the use of dielectric pads for 1Tx, or volume-selective and patient-specific RF shimming with pTx, were systematically compared with the purpose of evaluating benefits for clinically relevant anatomical imaging. Experimental results showed a consistent significant drop in the B1+ field map in the temporal lobe, which was ameliorated using pTx.

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