Abstract #4371
Joint multi-coil and low-rank constraints for accelerating FMRI data acquisition using k-t FASTER
Mark Chiew 1 , Stephen M Smith 1 , Thomas Blumensath 2 , and Karla L Miller 1
1
FMRIB Centre, University of Oxford, Oxford,
Oxfordshire, United Kingdom,
2
IVSR,
University of Southampton, Southampton, Hampshire,
United Kingdom
Recently, we introduced the k-t FASTER method for
rank-constrained acceleration of FMRI data acquisition.
The method used an iterative hard thresholding with
matrix shrinkage algorithm (IHT+MS) for image
reconstruction, and showed robust recovery of FMRI
resting state networks at modest (4x) acceleration
factors using only rank constraints. Here, we introduce
an enhancement of the IHT+MS algorithm that includes
multi-coil information to improve the data-consistency
by increasing the effective number of measurements. The
multi-coil k-t FASTER method is demonstrated in 8-fold
under-sampled data, using joint rank- and
coil-constraints to recover k-t FMRI data with high
fidelity.
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