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See my response to your question yesterday. Peace, Matt. -----Original Message----- From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Benjamin Rhiger Sent: Friday, May 22, 2009 6:07 PM To: [log in to unmask] Subject: [FSL] DICOM to nifti conversion difficulty I have been using MRIConvert to convert my DICOM files to nifti format. I have some DTI DICOM data from a that are a series of 15 slices for each of my 25 gradient vectors (390 slices in all, including the b0 scan). When I try to convert these files to a single 4D nifti file, MRIconvert only takes the last 15 slices and outputs a single 3D volume. I also have some DTI data from a Siemen's machine that is in mosaic form (that is each DICOM file in a given DTI series is a mosaic of slices) and MRIconvert seems to have no trouble converting these into the appropriate 4D nifti file. Has anyone else encountered this problem? I could divide the 390 DICOM files into 15-slice volumes "by hand," convert each volume separately and manipulate them using the fsl utilities. However, that seems cumbersome and I thought the DICOM mosaics were a recent development so this older converter should be able to handle my hefty stack of data, right? thanks!