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Abstract #0113

EPI Navigator Based Prospective Motion Correction Technique for Diffusion Neuroimaging.

Himanshu Bhat1, M. Dylan Tisdall2, Andre Jan Willem van der Kouwe2, Thorsten Feiweier3, Keith Heberlein1

1Siemens Medical Solutions USA Inc., Charlestown, MA, United States; 2A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, United States; 3Siemens Healthcare, Erlangen, Germany

In this work we developed a novel prospective motion correction method for multi-slice single shot diffusion weighted EPI. Rigid body navigation is achieved using non diffusion encoded low resolution single shot EPI images as motion navigators during the diffusion scan. Two approaches: integrated and interleaved are described. The proposed methods work independent of the b-value used and do not need retrospective adjustment of the b-matrix. The compromise for the integrated method is the TE and TR increase and the corresponding signal decrease while the interleaved method requires only a small (~10%) increase in minimum TR.