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It should be the same. Cheers, Mark. Mark Woolrich. Oxford University Centre for Functional MRI of the Brain (FMRIB), John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK. Work: +44-(0)-1865-222713, Mobile: +44-(0)-7808-727745 Email: [log in to unmask] On Wed, 3 Sep 2003, Xavier Chitnis wrote: > Dear Mark, > > Thanks for that. One further quick question: do I want to use the -M > and -V options to restrict the calculations to only non-zero voxels? > > Many thanks, > > Xavier > > > -----Original Message----- > From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On > Behalf Of Mark Woolrich > Sent: 03 September 2003 14:16 > To: [log in to unmask] > Subject: Re: [FSL] avwstats > > You could do: > > avwstats image -m > > to extract the mean and: > > avwstats image -v > > to extract the number of voxels, and then multiply them together to get > the sum of all voxel intensities in the image. > > Cheers, Mark. > > Mark Woolrich. > > Oxford University Centre for Functional MRI of the Brain (FMRIB), > John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK. > > Work: +44-(0)-1865-222713, Mobile: +44-(0)-7808-727745 > > Email: [log in to unmask] > > > On Wed, 3 Sep 2003, Xavier Chitnis wrote: > > > Dear All, > > > > > > > > I suspect this is really simple but I can't immediately figure out how > > to do it... > > > > > > > > I would like to extract the sum of all voxel values within an image. I > > looked in avwstats but can't see something that would do exactly that. > > > > > > > > Any help would be much appreciated, > > > > > > > > Thanks > > > > > > > > Xavier Chitnis > > > > > > > > >