10 Nov
2013
10 Nov
'13
1:59 a.m.
Hi,
My understanding of etiv is that it is derived from the registration of a brain to atlas space and not actually derived from the freesurfer segmentation. I have a set of patients imaged at 2 time points that all have different etiv values between the first and second scan that are statistically significant. As there was no change in their skulls between scans, I am having difficulty understanding how this is possible. Can anyone suggest what I may be doing wrong?
Best wishes,
Salil