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 Mon, 31 Jul 2017 07:48:02 -0700

 
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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