The Influence of Ghost Correction Accuracy on the Image Quality of GRAPPA Accelerated EPI
Skare S, Newbould R, Clayton D, Bammer R, Moseley M
We are assembled a 192x192 3-shot GRAPPA DW-EPI protocol in the clinics, where the GRAPPA weights are estimated on the T2w image and applied to each shot in the DWI's. Nyquist ghosting between odd/even echoes are normally corrected for by reference scans as a part of prescan. We show here that if this reference scan is not ideal, the GRAPPA weights are altered which produces noise enchancements in the DWI's.