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Abstract #1638

Distortion Correction using Reverse Polarity Gradient Method: Algorithm Optimization for Prostate Imaging using a Hybrid Weighting Metric

Maggie M Fung1, Pauline Worters2, Ek Tsoon Tan3, Arnaud Guidon4, and Ersin Bayram5

1Applications & Workflow, GE Healthcare, New York, NY, United States, 2Applications & Workflow, GE Healthcare, Menlo Park, CA, United States, 3Global Research Center, GE, Niskayuna, NY, United States, 4Applications & Workflow, GE Healthcare, Boston, MA, United States, 5Applications & Workflow, GE Healthcare, Houston, TX, United States

Prostate Diffusion Weighted Echo Planar imaging (DW-EPI) routinely suffers from nonlinear geometric distortion due to B0 inhomogeneity. Although reverse phase-encoding polarity-based distortion correction method works well in the brain, the same technique causes artifacts in prostate DWI due to the low SNR nature of body DWI scans, and the inconsistency of image content between the reverse and forward polarity images. In this study, we showed that a hybrid weighting metric method could improve the distortion correction performance in prostate DWI.

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