Abstract #3916
Acceleration of task-based FMRI using k-t FASTER
Mark Chiew 1 , Nadine N Graedel 1 , Stephen M Smith 1 , and Karla L Miller 1
1
FMRIB Centre, University of Oxford, Oxford,
Oxfordshire, United Kingdom
We demonstrate application of k-t FASTER, a low-rank
acceleration technique designed for FMRI data, on visual
task FMRI data acquisition. Here, we used a 3D hybrid
radial-Cartesian sampling strategy with combined
parallel imaging to acquire 2 mm isotropic whole brain
BOLD-weighted images at 0.6 s temporal resolution. Our
results show that k-t FASTER at high accelerations is
capable of capturing task-related FMRI activation with
high sensitivity, and that an independent components
analysis of the principal component subspace directly
estimated by k-t FASTER reproduces the expected temporal
and spatial patterns elicited by the visual task with
high fidelity.
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