Hi Amy
You can run tractography directly in standard space, by providing the standard-to-diffusion transform to probtrackx.
Then you can average the results from all subjects after transforming the fdt_paths into probabilities (e.g. divide by the value stored in the waytotal file).
Saad
On 25 Apr 2012, at 22:19, Amy wrote:
> Hi all,
>
> I'm currently working on a set of patient data using probablistic tractography using a seed mask. I have the tractography results for each patient in diffusion space, but I would like to know how I can perform a group level tractography analysis. Would averaging the tractography results (after transforming them into standard space) from each patient be sufficient?
>
> Thanks,
> Amy
>
--
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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