Hi Alessandro
we don't segment the claustrum at the moment, sorry. It would be hard to do so unless you had reasonably high resolution data. At 1mm you lose a lot of it. And yes, the aparc+aseg.mgz is the Desikan/Killiany and the aparc.a2009s+aseg is the Destrieux atlas
cheers Bruce
Thu, 7 Jan 2016, Alessandro Calamuneri wrote:
Hi freesurfer experts,
I have a few questions on claustra segmentations. I tried to look into archives but did not find an answer to all my points so far..
I have a group of subjects in which I would like to segment claustrum. Looking at lookup table a color is assignied for both left and right claustra; however, after running segmentation, I opened aparc+aseg results and did not find claustra. My questions are:
- Results of aparc+aseg.mgz are different from aparc.a2009s+aseg ones;
which one does correspond to Desikan-Killiany and which one to Destrieux? I mean, looking at tutorials, aparc.a2009+aseg should correspond to Destrieux, but I could not find aparc.DKTlas40+aseg, thus I am not sure about naming conventions...
- Do both atlases in principle permit to segment claustrum? In this case,
would missing of claustra be due to poor quality of my data? how could I work on processing pipeline to improve my parcellation and thus obtaining claustra?
- If claustrum is not automatically segmented, would you please provide
some hints on how to add a new structure based on manual segmentations and include them in segmentation pipeline?
Any suggestion will be appreciated.
Best Regards,
Alessandro