Aveage diffusion parameter of a generated track

Dear MRtrixers,

I was just wondering if there’s an easy way to calculate the average of a diffusion parameter (e.g. FA) of a track produced using tckgen. Just the average of the whole track, simply one value.

Sorry if my question is a bit elementary :sweat_smile:


There’s a few options:

  • tcksample -stat_tck to generate a text file containing the average value per streamline, which you can then average yourself.

  • tckmap to map the streamlines to an image, followed by mrthreshold -abs at some appropriate value, and finally mrstats -mask to extract the mean value of your parameter of interest.

These are probably your simplest options. Which one you use will depend on what you’re trying to do…

Thanks for the quick reply! Will test out both methods and see which one works best for me. Cheers :grin: