Hi You can combine fslroi with fslstats -w : fslroi T1image T1cropped `fslstats VentriclesMask -w` Saad. On 25 Aug 2012, at 17:24, özgün özalay wrote: > Dear FSL experts; > > I want to crop my CSF segmented T1 image using a mask to isolate lateral ventricles. fslroi command involves cropping structural images but arguments are x-y-z coordinates. How can i get this mask to extract lateral ventricles? > > All the best > > Ozgun -- Saad Jbabdi University of Oxford, FMRIB Centre JR Hospital, Headington, OX3 9DU, UK (+44)1865-222466 (fax 717) www.fmrib.ox.ac.uk/~saad