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Abstract #4345

Overproof GRAPPA: Exploiting the natural sparsity of fat images for 64-times accelerated motion navigators (FatNavs)

Daniel Gallichan 1 , Jos P Marques 2 , and Rolf Gruetter 1,3

1 CIBM-AIT, EPFL, Lausanne, VD, Switzerland, 2 Dept. of Radiology, University of Lausanne, VD, Switzerland, 3 Depts. of Radiology, Universities of Lausanne and Geneva, VD/GE, Switzerland

We recently demonstrated that the natural sparsity of fat images of the human head can be used to achieve extremely high acceleration factors. Here we demonstrate that this also allows conventional GRAPPA reconstructions at 64x acceleration, and use this for a motion navigator in a high-resolution MP-RAGE structural scan.

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