# Re: [Freesurfer] Total White matter and CSF value Calculation

```Thanks Douglas

From: freesurfer-boun...@nmr.mgh.harvard.edu
[mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Douglas Greve
Sent: 02 August 2017 21:15
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] Total White matter and CSF value Calculation```
```

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 + 5th
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

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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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