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Abstract #3152

B 0 shimming further improves human cardiac 31 P-MRS at 7 tesla

Lance DelaBarre 1 , Stefan Neubauer 2 , Matthew D. Robson 2 , J. Thomas Vaughan 1 , and Christopher T. Rodgers 2

1 CMRR, University of Minnesota, Minneapolis, MN, United States, 2 OCMR, University of Oxford, Oxon, United Kingdom

Human cardiac 31 P-MRS was recently shown to give 2.8x the SNR at 7T compared to 3T when using the scanners default B 0 -shims. In this study, we present the first human cardiac 7T 31 P spectra with B 0 shimming; we introduce a modification to the Siemens product 3D shimming tool to mitigate the strong variations in image intensity across the heart at 7T; and we quantify the further improvements in spectral quality due to shimming in 6 volunteers. In the septum, we observe 3039% reductions in linewidth, 3747% increases in SNR, and a 33% decrease in the PCr/ATP Cramer-Ro bound.

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