Hi,
Can you tell me how many gradients are required for tractography?
Thank you so much for your help!
Best
Hi,
Can you tell me how many gradients are required for tractography?
Thank you so much for your help!
Best
Hi @suhnyoung.jun,
Optimally, I reckon you’d want to aim for 45 ~ 60 gradient directions at a reasonably high b-value of e.g. 2500 s/mm^2 or higher. I haven’t seen results improve much, if at all, beyond that. That said, minimally, in our lab and collaborators’ experience, you can “get away” with 30 directions and b = 1000 s/mm^2, though results won’t be as good of course! For targeted tractography of well-known major structures, this might still be sufficient though.
Cheers,
Thijs
Thank you so much! It really helped a lot!!
Sincerely
Suhnyoung
No worries!