A point-spread-function mapping-based reverse-gradient approach was demonstrated as a viable method to correct severe susceptibility artifacts for deep-brain-stimulation fMRI in a pig model, but at the cost of reduced temporal resolution. Interleaved acquisition of the echo-planar-imaging was used with opposite phase-encoding polarities. In this work, feasibility was evaluated in in-vivo resting-state fMRI reliability in high-susceptibility regions. To compensate for the reduced temporal resolution, multi-band imaging was used, and the improved reliability in highly susceptible regions was evaluated on both standard whole-body and high-performance compact 3T scanners.
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