Hi fsl experts, I was just following the tbss instructions and wanted to check after <tbss_3_postreg -T> if the threshold of 0.2 is good. <fslview all_FA -b 0,0.8 mean_FA_skeleton -b 0.2,0.8 -l Green> I played around with the threshold in mean_FA_skeleton and nothing really changend and then I realized that the values range in the thousands. fslstats mean_FA_skeleton.nii.gz -R 0.000000 8676.000000 fslstats mean_FA_skeleton.nii.gz -r 2038.859985 7617.527832 Any ideas? Michael