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Abstract #0647

Nyquist Ghosting Correction For Simultaneous Multislice Echo Planar Imaging

Kangrong Zhu 1 , Robert F. Dougherty 1 , Atsushi M. Takahashi 2 , John M. Pauly 1 , and Adam B. Kerr 1

1 Stanford University, Stanford, CA, United States, 2 Athinoula A. Martinos Imaging Center at MIT, McGovern Institute for Brain Research, MIT, MA, United States

In simultaneous multislice (SMS) EPI the ghosting artifacts cannot be accurately corrected in each individual slice if the correction is performed independently of the slice unaliasing. In this work a SMS acquisition is represented as a 3D k-space acquisition, where the k x dimension is fully sampled and the k y -k z plane is undersampled. Eddy current effects that lead to the ghosting artifacts are treated as part of the encoding matrix, allowing both slice unaliasing and eddy current effects to be simultaneously and accurately corrected for with the proposed matrix-decoding method. Parallel imaging reconstruction is also incorporated in the proposed method.

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