Identification and correction of the intra-scan motion artifact using parallel imaging
Chen N, Chou Y, Panych L
Brigham and Women's Hospital, Harvard Medical School
It has been shown previously that parallel imaging may be used to improve the spatial-temporal-resolution of dynamic scans, or to reduce the effective echo time and geometric distortions in EPI. Here we propose a new application of parallel imaging technique: identification and correction of intra-scan motion artifact. The phase-encoding in conventional 2D and 3D spin-warp imaging is re-ordered in such a way that the parallel imaging technique can be applied to detect and correct the intra-scan motion. Additional low ky lines are acquired so that the coil sensitivity can be estimated in the presence of subject movement.