[Freesurfer] Total Surface Area

Hi Experts,

I am trying to figure out the total surface area of a hemisphere. I found out 3 ways to read the area data:

1. Read the lh.area file directly [A, f]=read_curv('lh.area'); Total surface area: sum(A) = 86905.15mm^2 2. Read from the ~/stats/lh.curv.stats (generated by mris_curvature_stats in recon-all): Raw Total Surface Area: 87347.86719 mm^2 3. Read from the results: % mris_anatomical_stats sub lh white total surface area = 91046 mm^2

First, the total area includes the cutting area (unknown region?), right? Secondly, which total area is more reasonable? Thanks.

XJ Kang