Samantha J. Holdsworth1, Stefan Skare2, Murat Aksoy1, Rafael O'Halloran1, Roland Bammer1
1Department of Radiology, Stanford University, Palo Alto, CA, United States; 2Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
Two approaches for Readout-Segmented (RS)-EPI have purported to increase the SNR for DWI. One fills k-space with full readout segments (RS-EPI-X), and the other which minimizes the TE with partial readout segments (RS-EPI-Y). Here we explore the scan efficiency of RS-EPI-Y and RS-EPI-X. Human brain data show that SNR efficiency is about equivalent, except for the case of a higher matrix size combined with twice-refocused DW preparation whereby RS-EPI-Y has 1.6 times better scan efficiency than RS-EPI-X.