Abstract #1375

Dual-echo volumetric navigators for field mapping and shim correction in MR neuroimaging

Alan Chu¹, Yulin Chang², André J. W. van der Kouwe³, and M. Dylan Tisdall¹

¹Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States, ²Siemens Medical Solutions USA, Inc., Malvern, PA, United States, ³Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States

We demonstrate the feasibility and validity of field mapping using a dual-echo vNav based on a fly-back EPI readout. A human subject was scanned using the proposed method and a standard FLASH acquisition for comparison. The proposed method does not require additional reconstruction or acquisition complexity and is easily computed on typical MR scanners to support real-time motion and shim correction.

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