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If you still feel the need to slice time correct you could use AFNI's 3dTshift, but see Steve's response. # read your I-files in using "Ifile '*/I.*' " and then "./GERT_Reco" 3dTshift -prefix whatever+orig.BRIK # to get them into fsl change the orientation, check that L/R is correct 3daxialize -prefix reorient -orient RPI whatever+orig.BRIK # convert BRIKs to adw format (3d!) 3dAFNItoANALYZE func2fsl reorient+orig. # make a 4d file from 3d files avwmerge -t func4d func2fsl_*.img # clean up rm -rf reorient+orig.* rm -rf func2fsl_* hope this helps h. -----Original Message----- From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Andy Goldfine Sent: Tuesday, July 23, 2002 3:57 PM To: [log in to unmask] Subject: [FSL] slice timing How do you do slice timing in FSL? Is it recommended for an experiment with 21 slices and a TR of 2.5?