Hi Gabor - The info that tracula uses is which aparc+aseg labels each pathway neighbors at each point along its trajectory. It learns this information from the 33 subjects in the atlas, where the pathways were labeled manually, and then applies that knowledge to reconstruct the pathways in your subject.
As long as the aparc+aseg of your subject is consistent with the ones in the atlas, you're fine. But if you think that the version you used to generate your aparc+aseg, and the latest version, that the aparc+aseg's in the atlas were generated with, have significant differences, this *may* be a problem. The extent of the problem will depend on how often the problematic label occurs next to one of the 18 pathways that tracula reconstructs and how different the label is b/w the versions. A small diference will probably not affect tracula at all. Your aparc+aseg's were generated with freesurfer 4.5, and there was no tracula atlas generated with that version of aparc+aseg's. Hope this helps, a.y On Fri, 28 Sep 2012, Gabor Perlaki wrote: > Dear Anastasia, > > Thanks a lot your answer. My fear is that the pars triangular > segmentation also seems bad, because it is right lateralized in most > of our analyzed data. Here is the post about this issue: > https://mail.nmr.mgh.harvard.edu/pipermail/freesurfer/2012-June/024541.html > > Is it also OK with Tracula? > > Thank you in advance, > Gabor > > 2012/9/27 Anastasia Yendiki <ayend...@nmr.mgh.harvard.edu>: >> >> Hi Gabor - Tracula doesn't use the BA labels, only the labels in the >> aparc+aseg. I hope this answers your question. >> >> a.y >> >> >> On Sun, 16 Sep 2012, Gabor Perlaki wrote: >> >>> Dear Anastasia, >>> >>> Earlier I was posted an issue about BA44/pars triangular: >>> http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg23706.html >>> >>> Because TRACULA also uses the cortical parcellation it may be >>> important to handle this issue somehow. Is it handled in TRACULA >>> analysis? Does it affect the result of WM-volumes? >>> >>> Thank you for your answer, >>> Gabor >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> >>> >> >> >> The information in this e-mail is intended only for the person to whom it is >> addressed. If you believe this e-mail was sent to you in error and the >> e-mail >> contains patient information, please contact the Partners Compliance >> HelpLine at >> http://www.partners.org/complianceline . If the e-mail was sent to you in >> error >> but does not contain patient information, please contact the sender and >> properly >> dispose of the e-mail. >> > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
