Hi you can use fslroi for that. Type fslroi to get the usage. Cheers -------------------- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford. OX3 9 DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve ---------------------- On 17 Nov 2008, at 07:50, xingwen Liang <[log in to unmask]> wrote: > Hi all, > > I want to remove the last 200 volumes from a 490 volumes 4D imaging. > How can I do that? I am a beginner, could anyone please give a > detail instruction of that? > > Thanks a lot! > > Kind regards, > Emma > > Find great deals on eBay Net yourself a bargain