Matteo,
There are a couple of ways you could do this. If you want to do your
tractography on the mean data, you could transform all of your diffusion
datasets into a standard space and then average them, run BEDPOST on them
and draw your ROIs and do the tractography. Alternatively, you can
transform the b0 to standard space and then use the transformation matrix to
transform each tractography individual result into standard space after you
have generated it in each subjects individual diffusion space. Then you can
make an average of these transformed tractography results. This second way
is how we did it for a recent study. You might also be able to use the TBSS
program for this, but I'm not familiar with that program.
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Matteo Pardini
Sent: Tuesday, May 22, 2007 8:15 AM
To: [log in to unmask]
Subject: [FSL] group tractography
Hi all!!
I have a question regarding FDT.
I am running probabilistic tractography on a group of subjects and I am
drawing my tract of interest in each subject separately.
My next objective is now to create a sort of " mean group pathway" for
this group and I was wondering if it was possible to run FDT on the group
mean FA or if my only option is to I make this " mean group pathway"
putting together all the tracts I generated from the single subjects?
I tried to run bedpost on my mean_FA using as nodif and struct the images
of the subject I used as target to generate the mean_FA but I didn't work
Thanks for any insight on this
Matteo :-)
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