Hi Joseph, Kindly are these a Matlab scripts. Kindly where can I locate them? There's vox2mm, and mm2vox for the reverse transform. -- Joseph M. Orr, Ph.D. Assistant Professor Department of Psychology Texas A&M University College Station, TX On Sat, Jun 11, 2016 at 7:36 PM, Jon Anderson <[log in to unmask]> wrote: Dear FSL experts, I want to inquire if there is any command in FSL that can convert the coordinates from voxels to mm . For example: For T1 images ( not in MNI space) if the coordinates are 17,71,48 how can I convert it to mm Thanks