Use mris_apply_reg --sval-annot lh.your.annot --streg lh.pial lh.pial.decimated --o lh.your.decimated.annot

On 7/29/2020 4:51 PM, Donelson Berger wrote:

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Hello FreeSurfer Expert,

I've run into a problem that I just can't seem to solve. After downsampling teh ?.pial surfaces using mri_decimate to 20,000 surfaces and 10,002 points, I don't know how to create .annot files for the new surfaces I created. I want to be able to tell which ROI each vertex is in for my new surface based off a parcellation.

I've been trying to use mri_ca_label, mri_ca_train, and mris_sample_parc, but I can't seem to get anything to work.

Do you have any suggestions?

Thanks for your help, Donelson Graham Berger

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