Hi Jason,
sulcal CSF, dura and everything else inside the skull that isn't brain.
cheers,
Bruce
On
Wed, 12 Dec 2007, Jason Reed wrote:
Hi all,
We want to normalize our data using eTIV and compared the eTIV values
generated in aseg.stats to the total brain volume we calculate by summing:
1) Non-cerebral cortex volumes from aseg.stats (including ventricles)
2) Cerebral cortex volumes from lh and rh.aparc.stats
We compared eTIV to the total brain volume as calculated above from aseg
and aparc.stats for 40 subjects and found that, on average, eTIV is 27%
larger. This difference is larger than we expect. Are we missing
something?
Thank you!
Jason
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