Hi Kei,

Here is my calculation:

  198 aparc.a2005s+aseg.mgz

  192 aparc.a2009s+aseg.mgz

  114 aparc+aseg.mgz

I can’t find aparc.DKTatlas+aseg.mgz in Freesurfer distribution directory. Is it the same as aparc+aseg.mgz?

Best,

Yujing

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> On Behalf Of Kei Nishimaki
Sent: Monday, November 20, 2023 5:57 PM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] How many regions does "aparc.DKTatlas+aseg.mgz" have?

        External Email - Use Caution        

Hello FreeSurfer Developers,

We ran recon-all on a 3D T1-weighted image, by default.

ls *.nii | parallel -–jobs 2 recon-all -s {.} -i {} -all -qcache

Our question is very simple.

How many regions does "aparc+aseg.mgz" and "aparc.DKTatlas+aseg.mgz" and "aparc.a2009s+aseg.mgz" have in each?

We checked the links below. And we want to renumber the region index from 0 as shown in the photo below.

MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/AnatomicalROI/FreeSurferColorLUT

However, the number of regions varies slightly depending on the subjects (103~106 in aparc.DKTatlas+aseg.mgz).

Therefore, we want to know the number of regions in three parcellation map.

1) FreeSurfer version: freesurfer-linux-ubuntu20_amd64-7.4.1.tar.gz

2) Linux ~~~ 5.15.0-76-generic #83~20.04.1-Ubuntu SMP Wed Jun 21 20:23:31 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

Thanks,

Kei