and also to --avoid="something" (without this, I still manage to
see a lot of clever fibers that find altrnate pathways to the
sides the must not arrive ;)
Naj
On Tue, 30 Oct 2007, David Gutman wrote:
> Yes-- I had a similar issue-- to isolate a specific path you also need to
> specify a --stop option, or at least this seems to have worked for me.
>
>
> >From what I was able to discern, it appears if you just specify a "Waypoint"
> (which is essentially what the two way symmetric mode does) then it keeps
> all fibers that go from "A" to "B" but then the fiber will continue on,
> leading to seemingly extraneous paths. What I had done is to specify both a
> waypoint (--waypoints option) and a stop mask (--stop )and use the same
> mask for both--
>
> Something like this..
>
> /usr/share/fsl/bin/probtrackx --mode=seedmask --seed=$SEED_MASK
> --stop=$TARGET_MASK --waypoints=$TARGET_MASKS
>
> should work (of course you need all the other probtrackx syntax as well or
> just use the GUI).
>
> dg
>
>
>
> DG
>
>
> On 10/29/07, Clare Emily Bajraszewski <[log in to unmask]>
> wrote:
> >
> > Hi everyone,
> >
> > I have been using a dual-region-of-interest approach (2 masks-symmetric on
> > FDT, with one mask in the primary visual cortex and another in the
> > anterior optic radiation) to track the optic radiations on each side, but
> > many tracts have been included that are not between the 2 masks.
> >
> > e.g. tracts crossing the midline, and tracts heading anteriorly to the
> > frontal lobe- these are clearly not part of the optic radiations.
> >
> > Has anyone else had this problem and can anyone help?
> >
> > Many thanks!
> >
> > Clare Bajraszewski (Howard Florey Institute)
> >
>
>
>
> --
> David A Gutman, M.D. Ph.D.
> Department of Psychiatry & Behavioral Sciences
> Emory University School of Medicine
>
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