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Dear FreeSurfer experts:

        I want to calculate mean pial surface area in DKatlas in individual space.And I know the function read_annotation.m in $FREESURFER_HOME/matlab for loading this atlas.

And if I can load sub/surf/?h.area.pial as the area in each vertice and calculate mean pial area by dividing sum PSA of all vertices in one ROI by the number of vertices in this ROI?

But why my result is not the same as result in sub/stats/?h.aparc.stats ?  Does the column named surface area represent mean PSA in each ROI?