Dear MRtrix developers,
I am currently using tckgen to do tractography and I am interested in starting the tracking on a specific direction. This is helpful since in the region that I am tracking different bundles cross, and I am interested in only one of them. For what I saw in the source code, the initial direction that I give is being “rotated”. The code in particular is: “rotate_direction (d, random_direction (max_angle, sin_max_angle));” where the parameters come from here.
To clarify, is this trying to rotate my initial direction in order to bring it closer to a peak in the ODF? If this is the case, I will be very glad actually, since my initial direction is somehow close to the “real one” of the bundle, but is not necessarily very precise.
Thanks for your time!