Try using mris_expand, eg, mris_expand lh.white -1 lh.subwhite will create a surface 1mm into the WM
On 4/14/2022 7:50 AM, Lee Subin Kristine wrote:
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Dear FreeSurfers,
I am interested in sampling values in the superficial white matter (SWM) region, which is an area of about 0.5mm below the GM/WM boundary.
To extract values of each vertex in that region, I have successfully used the mri_vol2surf function with the projfrac option, such as below:
/mri_vol2surf --src <src_img> --out <output mgh file> --out_type mgh --hemi lh --projfrac -0.5 --regheader <recon-all output> --surf white --interp trilinear/
However, I would also like to get surface type files (like lh.pial, lh.white, etc) that I could overlay on Freeview for visualization purposes.
I see papers with figures that have a visualization of surfaces below the GM/WM boundary, but I am not sure how I can obtain this.
I would really appreciate if anyone could give me any hints or suggestions on how I could do the same.
Thanks in advance!
Best regards,
Kristine
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