Hi - if you set a target (using --targetmasks) and if this target is also your waypoint, then summing across seed_to_target gives you the same answer as waytotal.
Cheers
Saad
On 12 May 2012, at 01:44, Volker Baur wrote:
> Dear experts,
> a reviewer had a suggestion for us how to assess the connection strength for a particular pathway identified with probtrackx.
>
> "It is possible to determine how many of all emitted tracing samples reached the target (summing the voxel values in FSL over the "seed_to_target" images with the relevant option in FSL), and this measure is sometimes used as a determinant of connection strength."
>
> Perhaps someone of you can explain in what way is this proposed connection measure different from the values stored in "waytotal"?
> For tractography we used a seed mask, and one waypoint/termination mask.
>
> Thanks for any help,
> Volker
>
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
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