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Abstract #2491

B0 Drift Correction in Proton Chemical Shift Imaging

XIANFENG SHI1, Young-Hoon Sung1, Douglas Kondo1, and Perry F. Renshaw1

1Psychiatry, University of Utah, Salt Lake City, UT, United States

This study aims to improve 1H CSI data quality, by presenting a novel method for correction of B0 instability (0.9 Hz/min drift) due to gradient system heating produced by application of DTI and fMRI sequences. The method tracks magnetic field drift using three reference lines in the 1H CSI data, which allow misaligned spectral data to be corrected in post-processing. This novel method may be combined with any spectroscopic technique that employs water suppression. Both phantom and in vivo data are presented, to demonstrate improved SNR and spectrum quality, with minimal influence on metabolite data acquisition or added cost.

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