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Abstract #3245

Reconstruction of Simultaneous Multi-Slice EPI data using Dual-Polarity GRAPPA Kernels.

W. Scott Hoge1, Kawin Setsompop2, and Jonathan R. Polimeni2

1Radiology, Brigham and Women's Hospital, Boston, MA, United States, 2Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States

This work presents a new approach to reconstruct SMS-EPI data that employs Dual-Polarity GRAPPA (DPG). DPG accurately models non-linear EPI phase errors between data sampled on positive versus negative readout gradients. When applied to SMS-EPI data, DPG can simultaneously and robustly perform slice separation, recovery of missing data from in-plane acceleration, and slice-specific ghost correction. Phantom and in vivo results are compared to a conventional SMS reconstruction, and demonstrate that DPG reduces residual ghosts and ghosting-related phase interference artifacts.

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