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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