A comparison of the static and dynamic phase correction methods in timeseries EPI with parallel imaging

To correct Nyquist ghost artifacts in single-shot EPI, 2 or 3 lines of readout acquisition without a phase encoding gradient is commonly applied. While the phase correction information is updated for each measurement for timeseries of EPI, the phase shift could be corrected either by using single phase correction scan (called static here) or each phase correction scan (dynamic). In the abstract, we evaluated the performance of the dynamic and static phase correction in timeseries EPI. We found the static phase correction provides higher tSNR and less spatial variation of tSNR than the dynamic phase correction with parallel imaging technique.

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