Dear Listserv,
We are having difficulty interpreting the results of Probtrackx with termination mask on. We are using a termination mask shaped like a sphere to indicate our target ROI. The number of streamlines that we compute that reach this target are zero within the sphere and small numbers at the skin.
Is this because:
1) The termination mask allows the streamlines to penetrate one voxel into the target ROI and then "terminates" them?
2) The images are slightly misaligned and so there are erroneous inclusions of streamlines at the termination mask edge?
3) Some other reason?
Thanks so much for your help!
Catherine
|