Hello All,
We are interested in the ranges of eTIV values found by other
Freesurfer users. As noted below, one research group reports a mean
ICV of about 1560 cc for adults ranging from 20-90 years old.
Our sample (n=40) including males and females (51 to 83 years old) has
a mean eTIV of 1
Hi
yes, the FS ICVs mostly seem to work :-)
I still think one should watch out for outliers. We had a sample of 28
kids aged 8-13 yrs, and the ICVs were quite a bit off and useless for two
of those, so I would check all carefully especially if you have a group
that may have smaller than normal ad
Hi, for those interested: we have correlated FS's ICV estimates and
estimates from a procedure developed by Anders Dale (a deformable template
procedure, similar to the Shrink Wrapping procedure previously described
by Dale and colleagues (Dale et al, 1999; Dale and Sereno, 1993)).
Mean ICV from
Hi Paul,
Just as an aside, once you have a talairach_with_skull.lta file (whether
from v3 or v4), you can calculate eTIV as scale_factor/determinant(lta),
where the scale_factor employed is 2150.
Incidentally, using the -eTIV option of mri_label_volume, you can also
specify other transforms (e.g.
Hello Freesurfers,
I am interested in comparing eTIV calculated with version 3.0.5 to that
calculated by version 4.0.5 (64 bit Cent OS).
In order to compare eTIV for a single brain estimated in version 3.0.5
to version 4.0.5, I copied a subject's previous freesurfer output
(v3.0.5) into the
