Hello,
I was hoping to get some clarification on how exactly the cortical thickness number is calculated. In the videos, Doug says it's "the distance between the vertex on the white to the vertex on the pial, and you go backwards and forwards to compute the average thickness", and the 2000 paper says "the thickness is computed as the average of this distance measured from each surface to the other".
From what I understand, You find the closest vertex on the pial surface from a given white matter surface vertex, then calculate the distance both ways and take the average. Why is the value not the same both ways, i.e., from white to pial, and from pial to white?
Thanks very much, Eli
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