Hi John, I don't think there's an FSL command to do this, but it is easily done in Python, using numpy and nibabel: import nibabel as nib import numpy as np maskimg = nib.load('/path/to/my_3D_mask.nii.gz') data = maskimg.get_data() x, y, z = np.where(data == 0) Cheers, Paul On Thu, Jul 31, 2014 at 11:43 AM, John McLean <[log in to unmask]> wrote: > Dear FSL users, > > Is there a way using one or a couple of FSL commands to extract all the > voxel co-ordinates for a given binary mask? > > I thought for a second fslstats -x might do it, as I want all the > co-ordinates for voxels of intensity 1 (the max intensity), but it just > outputs a single voxel, which I guess is what it really is intended to do. > > Thanks > John >