The first formula is right. I would not trust the 2nd formula since we
don't compute actual ICV
On 8/2/17 2:22 AM, M Janani wrote:
Hi Douglas,
Thanks for your support.
From the below conclusion, can I say
Total ventricular CSF = (lh + rh) Lateral-Ventricle + = (lh +
rh)Inf-Lat-Vent + (lh + rh)choroid-plexus + 3rd-Ventricle +
4th-Ventricle + *5^th Ventricle + CSF.*
**
**Also Is it correct to compute Total CSF using the below mentioned
formula
Total CSF = Intracranial Volume – (Total white matter + Total
Gray matter)
Regards,
Janani
****
**
----------------------------------------------------------------------------------------------------------------------------------------------------
Douglas Greve
<https://www.mail-archive.com/search?l=freesurfer@nmr.mgh.harvard.edu&q=from:%22Douglas+Greve%22>Mon,
31 Jul 2017 07:48:02 -0700
<https://www.mail-archive.com/search?l=freesurfer@nmr.mgh.harvard.edu&q=date:20170731>
On 7/31/17 3:12 AM, M Janani wrote:
Hi Team,
Could you please confirm whether the below mentioned formulas to
compute Total WM and ventricular CSF are correct
1.Total White Matter = CerebralWhiteMatterVol + (lh+rh) Cerebellum
White Matter
looks right, though some times people will include brainstem as part of WM
2.Total ventricular CSF = (lh + rh) Lateral-Ventricle + = (lh +
rh)Inf-Lat-Vent + (lh + rh)choroid-plexus + 3rd-Ventricle + 4th-Ventricle
There is a 5th ventricle (which I think is basically the aqueduct).
There is also a segment called "CSF" (24) but can't remember what gets
labeled as "CSF"
Thanks for your support.
Regards,
Janani
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