Hi Derin,
for each face, it's the product of the average thickness at that face (over the 3 vertices attached to it), times the average white and pial surface areas of that face.
cheers, Bruce
On Wed, 5 Sep 2007, Derin Cobia wrote:
How is the volume of each cortical structure (and hemisphere) calculated? It seems I remember from somewhere that it is the thickness x average surface area of the tesselated triangles? Is this right? What I'm most interested in is how the cortical gray matter volume from mris_anatomical_stats is calculated. Is it the average thickness of the whole hemisphere x surface area, or is by adding up the volumes of all the parcellated structures from the atlas? I remember reading about it earlier, but couldn't find any info in the list archive or on the wiki. Thanks.
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