A common usage of the XTRACT output is to summarise tracts in terms of simple summary statistics, such as their volume and microstructural properties (e.g. mean FA). We provide XTRACT stats to get such summary statistics in a quick and simple way.
You can use XTRACT stats with any modelled diffusion data, e.g. DTI, bedpostx, DKI.
Simply provide; the directory (and basename of files, if any) leading to the diffusion data of interest, the directory containing the XTRACT output, the warp field (or use 'native' if tracts are already in diffusion space). If tracts are not in diffusion space, you must also provide a reference image in diffusion space (e.g. FA map).
The output (a .csv file) by default contains the tract volume (mm3) and the mean, median and standard deviation of the probability, length, FA and MD for each tract.