Thanks, This is what I exactly wanted....I did something like: fslmeants -i smwc11_1001.nii -c 66.3 45 41 but the output is different from the same voxel location in SPM. Can somebody explain me why? I also did it using mm instead of voxel coordinates. Hi, Try: fslmeants Best, Eugene -- On 29 February 2012 22:04, Rodrigo Perea <[log in to unmask]> wrote: Can somebody help me with this issue? I was wondering if there is a way to output a single voxel intensity given a specific location in an image? Lets say I do: <Output intensity_COMMAND> <xcoord> <ycoord> <zcoord> <specific image or images> I want to do so using fsl or SPM but for some reason i can't post in the SPM list serv. Thanks in advance, Rodrigo