Abstract #0495
Investigating the potential of highly accelerated FatNavs for dynamic shimming
Frdric Gretsch 1 , Jos P Marques 2 , Rolf Gruetter 1,3 , and Daniel Gallichan 1
1
CIBM, EPFL, Lausanne, Vaud, Switzerland,
2
Dept.
of Radiology, University of Lausanne, Vaud, Switzerland,
3
Depts.
of Radiology, Universities of Lausanne and Geneva, Vaud,
Switzerland
We recently showed that fat navigators (FatNavs) can be
used for motion correction of head scans, exploiting the
natural sparsity of the fat image to allow higher
acceleration factors than water images. In this work we
investigate the potential of using a dual-echo FatNav to
also estimate dynamic changes in the B0-field due to
respiration with the aim of applying the FatNavs to
also allow dynamic shimming. Our initial tests indicate
that the fat image is suitable for tracking
respiration-induced B0 changes and can do so even at
acceleration factors up to 6x9 for the FatNav.
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