You probably want something like BrainSegNotVent/Sum(CSF and Ventricles)
Is that what you mean?
doug
On 10/26/14 11:45 PM, Mahmoud wrote:
Dear all,
I used the the 3 steps of longitudinal analysis explained in
freesurfer longitudinal tutorial and need to compute the ratio
Parenchyma/CSF for
Dear Doug,
The problem is that I'm not sure what those terms exactly mean ! i.e. what
is exactly CSF ? ventricles contain CSF right ? Is CSF counts for subdural
CSF too ? I have a the aseg.stats with all terms inside but not sure which
one to pick up, that's why I'm asked here.
Thank you,
All CSF measures are ventricular, not sulcal. If you are in doubt, you
can always load the aseg.mgz and see what labels correspond to what. You
can also see
http://surfer.nmr.mgh.harvard.edu/fswiki/MorphometryStats
doug
On 10/27/14 9:40 AM, Mahmoud wrote:
Dear Doug,
The problem is that
Dear all,
I used the the 3 steps of longitudinal analysis explained in freesurfer
longitudinal tutorial and need to compute the ratio Parenchyma/CSF for each
of time points. Is this equivalent to compute the (total gray matter
volume + total cortical matter volume)/CSF from aseg.stats file ?
