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Abstract #4201

Initial Investigation of Multi-Probe Magnetic Field Monitoring on a Whole-Body Human System Operating at 10.5 Tesla:  Application to Spin Echo Diffusion Weighted EPI

Ruoyun E Ma1, Edwards Auerbach1, Kamil Ugurbil1, and Pierre-François Van de Moortele1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

DW-EPI is subjected to image distortion induced by eddy currents. Magnetic field camera has been shown to provide corrected reconstruction based on accurate measurement of actual k-space trajectories. In this study, initial effort was made to implement this approach in the context of a whole body human system operating at 10.5T where susceptibility challenges are greater. After characterization of the probe behavior and careful design of the probe signal acquisition scheme, field evolution during the EPI readout was mapped. Image reconstruction corrected with the measured encoding information demonstrated a significant reduction of image distortion in DW-EPI.

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