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Abstract #2568

Rapid Volume Shimming with Gradient Reversed EPI

Kevin Koch1, Eric Printz1, Dan Xu1

1GE Healthcare, Milwaukee, WI, United States

It has previously been demonstrated that EPI acquisitions with reversed phase-encode blip polarities can be used to correct image distortions. A by-product of these methods is a shift map that maps the two source images together. Here, we demonstrate that one of the algorithms previously utilized for distortion correction purposes can be modified to produce high-SNR volumetric field maps for shimming purposes. These results suggest that such methods could be used to collect spatially accurate volumetric field maps for shimming purposes in a matter of seconds.