PEAK-EPI: Feasibility and benefits of k-t-undersampled EPI acquisition and PEAK-GRAPPA reconstruction in fMRI

PEAK-EPI, i.e. permuted interleaved EPI acquisition together with PEAK-GRAPPA reconstruction, facilitates high spatial resolution (2mm at 3T) with whole brain coverage (60-63 slices) in task-related fMRI while maintaining high SNR and tSNR. Due to the shortening of the acquisition times per slice, distortion effects are mitigated. The feasibility PEAK-GRAPPA in task-related fMRI is presented with two different acquisition and reconstruction schemes and magnitude images as well as activation maps are compared to a reference EPI acquisition.

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