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Abstract #5257

Navigator-Based In-Plane Motion Correction for High Resolution 2D T2-Weighted Spin-Echo Prostate MRI

Eric A. Borisch1, Adam T Froemming1, Roger C. Grimm1, Daniel Reiter2, Phillip J. Rossman1, and Stephen J. Riederer1
1Radiology, Mayo Clinic, Rochester, MN, United States, 2St. Olaf College, Northfield, MN, United States

Synopsis

Keywords: Motion Correction, Motion CorrectionThe addition of ky≈0 navigator views to detect anterior-posterior prostate (peristalsis-induced) motion to the end of each echo train for a 2D T2-weighted acquisition stack with slice-profile recovery reconstruction is investigated. ROVir virtual coils are used to focus the spatial sensitivity in the phase direction of the navigator response on the small, central prostate region. Mutual information is used to register these navigators across the acquisition, with the resulting movement time course used to correct the acquired data. Results both in motion controlled phantom and human studies are discussed.

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