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Abstract #4101

Improved TSE imaging at Ultra-High Field using Non-localized Efficiency Shimming and Acquisition of Modes Optimized for Refocused Echo (AMORE)

Xiaoxuan He1, Simon Schmidt1, Stefan Zbyn1, Tobey Haluptzok1, Steen Moeller1, and Gregory J. Metzger1
1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States


To mitigate B1+ inhomogeneity at ultra-high field (UHF), we propose a novel non-localized efficiency shim and utilize this to optimize for T2W TSE contrast in a technique termed Acquisitions of Modes Optimized for Refocused Echo (AMORE). A non-localized efficiency shim is ideal for turbo spin echo (TSE) or fast spin echo (FSE) imaging of smaller anatomical targets such as brain and knee, while AMORE is an optimized TIAMO for improved TSE imaging in the torso by ensuring the desired B1+ is achieved. With AMORE two phase-only modes appear sufficient to mitigate the B1+ shadings and nulls in the interior torso.

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