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Abstract #0359

Dual-Polarity GRAPPA for the Robust Reconstruction of Multi-Channel EPI Data

W. Scott Hoge 1,2 and Jonathan R Polimeni 2,3

1 Dept. of Radiology, Brigham and Women's Hosp, Boston, MA, United States, 2 Harvard Medical School, Boston, MA, United States, 3 Dept. of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States

EPI is widely used in neuroimaging applications. However, many imaging artifacts are inherent in the method, with Nyquist ghosting one of the most prominent. Conventional methods to correct the sampling errors that give rise to Nyquist ghosts typically model only linear and constant phase error terms. In this work, we present a Dual-Polarity GRAPPA method to address the limitations of conventional Nyquist ghost correction. In-vivo results are shown that demonstrate the ability of the method to correct higher-order phase errors in EPI data. .

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