Hi
Yes the results of tracking is different if you swap seed and target, but that does not have to do with afferent versus efferent.
Saad
On 31 Jul 2012, at 09:51, SUBSCRIBE FSL Jay wrote:
> Hi Saad,
>
> Why is option 2 adding the two runs where seed and waypoint are swapped? I understand that it might be because both runs have slightly different results. Is this difference purely due to the random number generator or Does it mean that probtrackx is sensitive to the direction of tracking or fiber direction? If so, I am wondering if it can used to differentiate efferent(pathways leading away) and afferent (pathways leading to the cortex).
>
> BW
> Jay
>
--
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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