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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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