I have a question regarding tbss_deproject. I was performing this command to verify the location and value of the voxels on a single subject to check the results. I should add I only ran the first step on the entire all_FA_skeletonised to project the data on to the All_FA. The output of tbss_deproject confused me. I expected the voxels to be identical for the deprojected image and the underlay All_FA map. However, this was only the case for the first volume and the remaining volumes differed. Am I incorrect in my logic that these two images should contain the same value and if not why does this rule apply to only the first volume?