S12

View Abstract / View Presentation

The Effect of Enlarging Shim Volume on B0 homogeneity of MRS Voxel on 7T

Huijun Liao¹, Eduardo Jorge Uribe Coello¹, Wufan Zhao¹, Han Sam Jiang¹, and Alexander Lin¹
¹Center for Clinical Spectroscopy, Brigham and Women's Hospital, Boston, MA, United States

Enlarging shim volume by more than two folds in inhomogeneous regions like left hippocampus and left thalamus did not improve the B0 homogeneity of the MRS voxel. NAA and Glu were not as sensitive to B0 homogeneity as the low concentration metabolites like GSH and GABA.

Figure 1: Correlation between Shim Volume size and FWHM (Hz) reported by Siemens Syngo (in left temporal lobe region).