Meeting Banner
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.

This abstract and the presentation materials are available to members only; a login is required.

Join Here