Not that easy. I would do it by selecting a vertex that is close to the
coordinate you want, then
1. Create a surface overlay with all vertices = 0 except your chosen vertex
mri_volsynth --template $FREESURFER_HOME/fsaverage/surf/lh.thickness
--delta vertexno 0 0 0 --o delta.mgh
2. Smooth the overlay to expand the non-0:
mri_surf2surf --s fsaverage --hemi lh --sval delta.mgh --tval
delta.smoothed.mgh --nsmooth-in 10
This will expand out to a radius of 10 vertices
3. Binarize it
mri_binarize --i delta.smoothed.mgh --min .000000001 --o
delta.smoothed.bin.mgh
4. Create the label:
mri_cor2label --i delta.smoothed.bin.mgh --l delta.smoothed.bin.label
--surf fsaverage lh white
On 12/13/16 12:53 PM, Leyton Moscoso, Cristian Eduardo wrote:
Hi Freesurfer's experts
Is there an easy way to create automatically a circular label with a
radius centered on a vertex with predifined RAS/Tailarach coordinates
on the fsaverage surface?
Thanks
Cris
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