Hi Carlos
See below:
> From my understanding of probtrackx, if I only want the tracts
> between a
> seed and a single target to be shown I should specify the target as a
> waypoint and termination point. However,
> 1) I have noticed that in many
> cases it is sufficient to just specify the target as a waypoint and
That should not be true if your waypoint mask is, say, in the white
matter. Surely you must see a noticeable difference in this case?
> 2) when
> the seed and target (specified as a waypoint) are relatively close
> to each
> other many more pathways will be mapped, and understandably so. I
> thought
> the latter situation would be easily solved by specifying the target
> as a
> waypoint and termination point, but this seems to map out even more
> pathways
> or at the least not resolve the problem.
Adding a termination mask should not give you more non-zero voxels in
fdt_paths! Are you sure this is the case?
Are your seed and termination masks overlapping?
>
>
> Anybody have any suggestions as to how to correct this?
>
Saad Jbabdi
Oxford University FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
+44 (0) 1865 222545 (fax 717)
www.fmrib.ox.ac.uk/~saad
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