Hi Wen,
Brain volume has a good relationship with the overall surface area measured
in native space (so, irrespective to any kind of interpolation). We found
an R^2 of 0.856, which is higher even than the correlation of brain volume
with gray matter volume as measured via VBM-like methods.
Dear Freesurfer,
I have checked the mail list, none could answer my problem.
I added up the value of all vertxes in the .area or .area.pial files, find that
brain size did not contribute much to that vertex-sum. However, some experiment
used total brain volume as a regreesion
