fslroi <input 4D> <output 3D> <volume number> 1 Volume number starts with zero. Peace, Matt. -----Original Message----- From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Roderick McColl Sent: Monday, July 07, 2008 5:50 PM To: [log in to unmask] Subject: [FSL] fslsplit to extract one volume Is there a FSL cmd similar to fslsplit which allows you to extract one 3D from a 4D volume? When you have several hundred volumes its a pain to create that many 3Ds just to get a particular one. I can't find an existing cmd for this. Thanks -roddy