To get the pathway you want, specify a seed mask, a target mask, and the
same mask as a stop mask (same as the target). The size of the masks might
make less of a difference than the fact that you will encounter a different
pattern in the diffusion vector fields tracking in one direction as tracking
in the other. You might want to track symmetrically to avoid these
concerns. You could exchange the seed and target+stop masks and then sum
the results.
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Mayuresh
Sent: Wednesday, April 14, 2010 9:17 PM
To: [log in to unmask]
Subject: [FSL] probtrackx question
Hello all,
I am running Probabilistic tracking in FSL 4.1.4 using a seed and target
mask approach with an interest in analyzing the fiber connections existing
"only between" the seed and target mask.
Basically I am want to get fiber tracts starting from the seed and
terminating in my target - excluding sections of the fibers going beyond the
seed mask or the target mask. How can I do this?
A second question - my seed (A) and targets (B) are of different sizes - so
would it matter if I tract from A to B instead of B to A?
Thanks,
Mayuresh.
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