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Abstract #2560

Prospective motion correction of DW 3D-MS EPI using collapsed FatNav (cFatNav)

Mathias Engstrm 1,2 , Enrico Avventi 1,2 , Magnus Mrtensson 2,3 , Ola Norbeck 1 , and Stefan Skare 1,2

1 Dept. of Neuroradiology, Karolinska University Hospital, Stockholm, Stockholm, Sweden, 2 Dept. of Clinical Neuroscience, Karolinska Institutet, Stockholm, Stockholm, Sweden, 3 EMEA Research and Collaboration, GE Applied Science Laboratory, GE Healthcare, Stockholm, Sweden

Here we suggest combining collapsed fat navigation (cFatNav) with diffusion-weighted 3D multi-slab echo-planar imaging (DW 3D-MS EPI) for prospective motion correction. 3D rigid body motion was registered via three orthogonal EPI readouts, which depicted projections of the subcutaneous fat. With a readout block duration of 6.4 ms (R = 8) motion updates were received at a ~5-10 Hz update rate, at a 5% scan time increase.

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