Abstract #3165
Optimal Arrangement of Finite Element Loop Arrays for Parallel Imaging in a Spherical Geometry at 9.4 T
Andreas Pfrommer 1 and Anke Henning 1,2
1
Max Planck Institute for Biological
Cybernetics, Tuebingen, Germany,
2
Institute
for Biomedical Engineering, UZH and ETH Zurich, Zurich,
Switzerland
Parallel imaging with a finite number of array elements
is limited by the g-factor enhancement for high k-space
undersampling. To fully exploit the unfolding potential
of circular surface coils surrounding a spherical head
phantom, we developed an optimization routine to
minimize the maximum value of the g-factor inside the
head region. As a result we showed optimal
arrangements for 8, 16 and 32 channels at 9.4 T with
different acceleration rates. Moreover we precisely
specified the range of possible g
max
values
for each setup including optimal and worst case
positioning of the loops.
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