Hi Anastasia,

Many thanks for your reply and help. I was wondering that instead to redo all the preprocessing and registration steps s mentioned on FSTutorial/Running Tracula:
  • Eddy-current correction
  • Intra-subject registration (diffusion data to T1)
  • Inter-subject registration (individual subject to a common space)
  • Creation of cortical and white-matter masks from FreeSurfer recons

I can use all this results from my DTI Data Analysis Preprocessing Stream as mentioned on the FSTutorial/Diffusion, by running first the dt_recon (this is performing an Eddy-current correction) and then I resampled structural data in the Diffusion space (aparc+aseg2diff.mgz, wm2diff.mgz), then I applyed the mask to the diffusion data and removed the unwanted "noise", using the 'mri_mask' command to get the masked fractional anisotropy volume (fa-masked.mgz), adc-masked.mgz and then doing individual subject registration on the CVA space and get resampled int CVS space (fa-masked.ANAT+CVS-to-avg35.mgz) using the using mri_cvs_register.


I also have all the outputs mentioned under FSL's dtifit since I got them by running dt_recon.

So I wonder if is possible to perform a DTI probabilistic tractography using TRACULA by starting only from the last two steps mentioned in trac-all -prep:
  • Computing anatomical priors for WM pathways, Recontructing WM Pathways, then visualizing the WM pathways, and then doing only statistics.
This is what I meant by my previous results.

Thank you for your time and help.

Antonella
From: Anastasia Yendiki <ayendiki@nmr.mgh.harvard.edu>
To: Antonella Kis <atorok9@yahoo.com>
Cc: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Sent: Wednesday, March 28, 2012 2:07 PM
Subject: Re: [Freesurfer] dt_recon and tractography


Trackvis does deterministic tractography, not probabilistic.

Which previous results do you want to use and why?

On Wed, 28 Mar 2012, Antonella Kis wrote:

> Dear FS experts,
>
> I would like to know if for a Diffusion tensor imaging (DTI) tractography study
> with TRACULA I can use my previous results from FSTutorial/Diffusion more
> exactly my results after running dt_recon and registrations on the CVS space.
> If not can you please advise me if for a DTI probabilistic tractography using
> my previous results as mentioned above I can use TracVis.
>
>
> Thank you.
> Antonella
>
>
>
>
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