Not sure what you are referring to by "problems seeing lots of differences." eddy_correct does eddy current correction using linear registration to the first b0 image. Peace, Matt. -----Original Message----- From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Torsten Ruest Sent: Tuesday, July 27, 2010 8:41 AM To: [log in to unmask] Subject: Re: [FSL] eddy current correction in DTI Thanks Matt for the quick reply. But what about the eddy correction in general not considering the registration process. Would that improve image quality at all using a Spin Echo sequence, ie by removing residual distortions etc? I have even problems seeing lots of differences when looking at eddy corrected EPI DTI data, which doesn't mean that it's not doing it! Thanks, Torsten