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Hi, The values used on the skeleton are projected from other points nearby (representing the centre of the individual tracts). More details can be found in the TBSS paper (referenced on the FSL wiki). All the best, Mark On 13 Aug 2014, at 09:39, Jason S. Lee <[log in to unmask]> wrote: > Hi y'all > > I learned that mean FA skeletonised image is an eroded image of mean FA image. So I assumed that a particular voxel on the skeletonised image represents the average FA value of all subjects in that specific point but I want to make sure that is true. Could you please let me know the exact meaning of the values of voxels on a skeletonised image? > > Can a voxel on skeletonised image represent surrounding voxels? or it just represent mean value on that specific point? > > Looking forward to hearing from you. > > Regards,