Eddy current-induced artifact reduction in spiral trajectory balanced-SSFP for transition-band SSFP fMRI
Lee J, Pauly J
Eddy currents in balanced SSFP can cause serious artifacts. In nonphase-cycled balanced SSFP, the direction of the undesired spin dephasing induced from eddy currents is not alternated by the RF phase cycle; therefore conventional sequential phase encodes ordering or rotational interleaves ordering causes phase accumulation. 'Alternating interleaves ordering (or phase encodes ordering)' is suggested to remove the piling of the eddy current-induced spin dephasing. Significant reduction in imaging artifacts and phase changes in FID is observed with this new ordering method.