Dear MRtrix community,
I have some doubts regarding the cutoff value for the function tckgen. In the documentation it is written that “set the FA or FOD amplitude cutoff for terminating tracks (default is 0.1)”.
If I use the CSD model with probabilistic or deterministic tracking, is the cutoff value always referred to the FOD amplitude threshold? And is it referred to the FA threshold only if I don’t use CSD?
Is the cutoff value used to terminate the tracking when the FOD amplitude is below the value? Or is it used to remove directions from the probability mass function for selecting the tracking direction (in the case of probabilistic tracking)?
Thank you in advance!