Dear FreeSurfer Experts,
I'd like to merge my cortical thickness measures across left and right hemispheres. Simple averaging of the ?h.thickness values would probably be the most straightforward method, but would it be more accurate to use a surface-area weighted average?
i.e. entorhinal_combined = (lh_entorhinal_thickness * lh_entorhinal_area + rh_entorhinal_thickness * rh_entorhinal_area) / (lh_entorhinal_area * rh_entorhinal_area)
Alternatively, the average could be weighted by the number of vertices (discussed in an old FreeSurfer mailing thread, but never quite concluded). Please let me know what you think.
Thank you, Kelvin Liang
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