area is the area of the white surface. It  is  not as clear a concept as, eg, thickness. Basically, when the surface is registered to the atlas, it has to be stretched in some places and compressed in others. The stretching and compression will be different in different subjects and there may be an effect within group. Area allows you to probe this possibility. area.pial is the area of the pial surface.

volume is area*thickness

sulc is the sulcal depth -- how much a vertex has to move to get to the inflated surface

curv is the curvature. white.{K,H} are two types of curvature

w-g.pct.mgh is the percent difference between the gray and white matter intensities

I'm not  sure what the intensity files are; I don't think they are created by recon-all.

On 7/27/2020 12:22 PM, Sonya Gupta wrote:

External Email - Use Caution

Hi, Hope you are having a wonderful morning! In QDEC in the Design tab under the measurement parameter, there are a variety of options (thickness, area, area.pial, volume, sulc, curv, white.K, white.H, w-g.pct.mgh, intensity.deep, intensity.superficial, intensity.deep.mgz, and intensity.superficial.mgz). I was wondering, what is the difference between these measurement options? I couldn't find much documentation online. Thank you!

Sincerely, Sonya

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer