Ok,thank you for the clarification! Best Heidi

From: <freesurfer-bounces@nmr.mgh.harvard.edumailto:freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of "Yendiki, Anastasia" <AYENDIKI@mgh.harvard.edumailto:AYENDIKI@mgh.harvard.edu> Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu> Date: Thursday, March 16, 2017 at 10:32 PM To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu> Subject: Re: [Freesurfer] Tracula: anatomical priors

Hi Heidi - TRACULA does not use deterministic constraints like pre-defined ROIs to reconstruct the tracts. For each point along a tract (and not just the end points), it has a prior probability (that it has computed from the atlas subjects) that a tract goes through each of the aparc+aseg labels, or goes next to (in the L, R, A, P, etc direction) each of the aparc+aseg labels.

Best, a.y

________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edumailto:freesurfer-bounces@nmr.mgh.harvard.edu [freesurfer-bounces@nmr.mgh.harvard.edumailto:freesurfer-bounces@nmr.mgh.harvard.edu] on behalf of Jacobs H (NP) [h.jacobs@maastrichtuniversity.nlmailto:h.jacobs@maastrichtuniversity.nl] Sent: Wednesday, March 15, 2017 12:47 AM To: Freesurfer support list Subject: [Freesurfer] Tracula: anatomical priors

Dear FreeSurfers,

Where can I find the anatomical ROIs from the aparc/aseg (end and begin points) that are being used to reconstruct the tracts in Tracula?

Many thanks Heidi