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Abstract #0578

Artifact Correction in Accelerated-Segmented EPI data via Dual-Polarity GRAPPA

W. Scott Hoge1,2 and Jonathan R Polimeni3,4

1Radiology, Brigham and Women's Hospital, Boston, MA, United States, 2Harvard Medical School, Boston, MA, United States, 3Radiology, Massachusetts General Hospital, MA, United States, 4Harvard Medical School, MA, United States

A method to reconstruct images from multiple EPI segments in presented. Leveraging the reconstruction framework from Dual-Polarity GRAPPA, data from each segment and readout polarity are modeled as sampled on separate grids. After phase-matching calibration data to each segment, a GRAPPA-like reconstruction kernel is generated. This parameterization ensures that differences in signal phase across all data polarities and segments can be captured in the reconstruction kernel. We present in-vivo images reconstructed using this approach from concurrently segmented and accelerated high-resolution gradient-echo and spin-echo data acquired at 7T.

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