Abstract #0656

Concurrent Field Monitoring in HCP dMRI at 7T: Correction for Eddy Current Induced Signal Blurring and Geometric Distortion.

Ruoyun Emily Ma¹, Mehmet Akçakaya^1,2, Steen Moeller¹, Connor Benson¹, Edward Auerbach¹, Kâmil Uğurbil¹, and Pierre-François Van de Moortele¹

¹Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, ²Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, United States

DW-EPI at high diffusion gradients suffers from eddy current induced signal blurring and geometric distortion. In this study, concurrent monitoring of field evolution with NMR probes was implemented for HCP diffusion MRI acquisition at 7T. After image reconstruction with field correction, eddy current induced geometric distortion was largely removed, yielding similar level of correction obtained by data driven approaches such as EDDY. Signal blurring was further reduced than with EDDY. Future efforts will be made to quantify the impact on cortical tractography of this improved DW-EPI reconstruction.

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