12 Dec
2007
12 Dec
'07
4:09 p.m.
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