Did you verify that your diffusion directions are correctly oriented with
respect to what you would expect anatomically (by loading the FA and V1 with
lines)?
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Ms Kerstin Hoffmann
Sent: Thursday, July 05, 2007 7:56 PM
To: [log in to unmask]
Subject: [FSL] problem with probtrack
Hi!
I just ran into a problem using the connectivity based
seed-classification option in probtrack. Using all brain voxels (FA >
0.1) as seed mask and an axial cut of the internal capsule as target
(number of samples 300), I got only about 15 voxels with intensity >0.
Using a seed mask inside the internal capsule and a target mask right on
top of it returned equally poor results.
Also, when I use the single seed voxel option, the output file contains
no voxels with intensity >0, but using the same voxel in seed mask
option, I get results that look fine.
I also ran FEEDS, and no problems were reported.
Any advice would be greatly appreciated.
Thanks
Kerstin
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