The Correction of Motion-Induced Coil Sensitivity Miscalibration in Parallel Imaging with Prospective Motion Correction

Unlike the retrospective technique, prospective motion correction (Mo-Co) can avoid spin history effects as well as k-space inconsistencies. However, in case of large motion during multi-coil acquisition, the coil sensitivities that change relative to the object are one of the most considerable residual artifact causes in prospective Mo-Co. In this study, we investigate the effect of coil sensitivity variations on parallel prospective Mo-Co data if only initial coil sensitivities are known. We also show that if a small number of central k-space can be acquired when motion occurred, they are sufficient for estimating coil sensitivities to correct abovementioned artifact.

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