Dear freesurfer experts,
I would like to know how to have paint surfaces (.w) from different subjects into a common surface (fsaverage for example) and/or would like to know if my current approach is correct:
I have first used the general "recon-all" step on some T1-w images. Subsequently I used "mris_expand" to create the different surfaces at different depths. with "mri_vol2surf" I was able to obtain the T1-w images in the various surfaces. At that moment my different subjects surfaces had different number of vertices and I would like to average them together.
Using matlab, read_surf, I loaded the coordinates in the sphere of the subject data and of the fsaverage data. Subsequently I used the matlab function distributed with freesurfer, mesh_vertex_nearest, to find the nearest vertices of the subject sphere surface to those of the fsaverage surface. I then created a new paint surface where only those vertices were taken into account.
Could I say that now all my subjects are co-registered and that I can use the PALS12.annot distributed with fsaverage to extract the properties of the different Brodmann areas?
Is there a better way to do this?
Thanks in advance,
Jose Marques