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Hi Len,

 

As I understand it, .annot file is surface overlay for cortical surface parcellation.

 

I’m trying to understand what you mean by “volumetric aparc.annot”. How did you obtain the file?

 

Best,

 

Yujing

 

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> On Behalf Of Len Jacob
Sent: Tuesday, April 18, 2023 2:54 PM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] Loading and editing volumetric .annot in Matlab

 

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Dear Freesurfer enthusiasts,

 

I would like to load a volumetric aparc.annot file into Matlab with the goal of editing the color information for certain ROIs in order to convey some group-level results in the subcortex.

 

I've previously done this for cortical surfaces by loading lh.aparc.annot (and rh.aparc.annot), but I now need to convey surbcortical results, and read_annotation does not work for the volumetric aparc.annot. I assume write_annotation would not work either.

 

All the information I have been able to find relating to modifying a .annot and creating custom colortables has been for surface data. Any help in getting this done in the subcortex would be appreciated.

 

Best regards,

Len


--

Leandro P. L. Jacob, Ph.D. (he/him)
Postdoctoral Associate at the Lewis Lab

Biomedical Engineering Department, Boston University