Hi Sean - Sure, there's nothing special about how trac-all runs bedpostx, you can use the outputs to run probtrackx as well. As for using cortical labels from freesurfer as seed masks for probtrackx, it's advisable to grow the labels into the white matter by a couple of voxels (mri_aparc2aseg can do that for you).

a.y

On Wed, 24 Apr 2013, Sean Hatton wrote:

Hi all,

Is it possible to use the Tracula bedpostx data to run Probtrackx with different seed points? For example:

1. Run all of Tracula on subject.
2. Extract seed masks from FS (eg seed superior temporal gurus to target anterior insula).
3. Run Probtrackx with the dbedpost data and masks in diffusion space.

Is this feasible? I would get connection strength but how would I get FA, AD, RD etc? Should I correct for ICV?

Or am I barking up the wrong tree?

Sean Hatton Brain and Mind Research Institute University of Sydney

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