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Abstract #3965

Blip-Up Blip-Down Correction for Head MR Elastography

Roger C Grimm1, Kevin J Glaser2, and Richard L Ehman2

1Radiology, Mayo Clinic, Rochester, MN, United States, 2Mayo Clinic, Rochester, MN, United States

Geometric distortion in echo planar imaging-spin echo (EPI-SE) images caused by a non-uniform B0 field remains an issue in clinical imaging. In elastography, this geometric distortion leads to systematic errors in stiffness estimates. While blip-up blip-down correction is routinely used in diffusion imaging in the head, this correction is not used in MR elastography. The purpose of this work is to assess the effect of applying distortion correction on elastography scans and the resulting stiffness estimates. We show that the corrections provide reduced variability in stiffness maps with no additional acquisition time required.

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