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Abstract #0616

Spiral Crisscrossing Echo Planar Time-resolved Imaging (SCEPTI)

Gilad Liberman1, Fuyixue Wang1, Zijing Dong1, and Kawin Setsompop1
1A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, United States

A new technique, termed Spiral Echo Planar Time-resolved Imaging (SKEPTIC), was developed to address both EPI’s geometric distortion and blurring and augment the recently introduced Echo Planar Time-resolved Imaging (EPTI). In SKEPTIC, the (2+1)-D k-t space is traversed using several matching out-in spirals within a single shot, and can benefit from additional rotated and time-jittered shots. The out-in multi-spiral trajectory is incoherent with field inhomogeneity phase evolution in both axes. This results in the ability to deliver single-shot 1.9mm2 in-plane resolution distortion-less, sharp multi-echo images with B0 and T2* mapping, and inherent motion, phase and B0-variation estimates for multi-shot imaging.

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