Hi Elizabeth,
The measure called "CorticalWhiteMatterVol" *is* the total cerebral white
matter.
See this page:
http://freesurfer.net/fswiki/MorphometryStats
The values for the "{lh,rh}CorticalWhiteMatterVol"measures in aseg.stats
used to be the same as that returned by the 'mris_wm_volume' function,
although that changed as of FS 5.2. (Doug: Why is the output of
'mris_wm_volume' no longer in sync with the output from 'mri_segstats'?
What differs between the two calculations?)
cheers,
-MH
--
Michael Harms, Ph.D.
-----------------------------------------------------------
Conte Center for the Neuroscience of Mental Disorders
Washington University School of Medicine
Department of Psychiatry, Box 8134
660 South Euclid Ave. Tel: 314-747-6173
St. Louis, MO 63110 Email: mha...@wustl.edu
On 3/21/14 1:49 PM, "Adeyemi, Elizabeth (NIH/NIMH) [C]"
<elizabeth.adey...@nih.gov> wrote:
>Thank you for your response. But just to clarify a bit further, in the
>asegstats2table there are values given for TotalGrayVol. I am assuming
>this includes both subcortical and cortical measures for GM along with
>cerebellar values, etc. Likewise, I am looking for TotalWhiteVol or a way
>of calculating both cortical and subcortical measures of White Matter
>along with deep tissue values such internal capsules, etc. Your response
>gives me CorticalWhiteMatterVol, as shown in the output. However, I am
>looking for Total Cerebral White Matter. Specifically, I want cortical
>white matter and the volume of deeper cerebral white matter structures
>like internal capsule etc. Which label is ascribed to these deeper
>volumes?
>>
>> Elizabeth Adeyemi
>> On Mar 19, 2014, at 6:27 PM, Douglas N Greve wrote:
>>
>>
>> If you want total cerebral WM, then use the values in aseg.stats
>>
>> # Measure lhCorticalWhiteMatter, lhCorticalWhiteMatterVol, Left
>> hemisphere cortical white matter volume, 182991.109375, mm^3
>> # Measure rhCorticalWhiteMatter, rhCorticalWhiteMatterVol, Right
>> hemisphere cortical white matter volume, 196871.406250, mm^3
>> # Measure CorticalWhiteMatter, CorticalWhiteMatterVol, Total cortical
>> white matter volume, 379862.515625, mm^3
>>
>>
>> On 03/19/2014 05:48 PM, Adeyemi, Elizabeth (NIH/NIMH) [C] wrote:
>> Hello,
>>
>> I need assistance calculating Total White Matter. Can I simply add
>>Cortical White Matter + Unsegmented White Matter (given in the aseg
>>wmparc output)?
>>
>> Thanks
>>
>> Elizabeth Adeyemi
>>
>>
>>
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>>
>> --
>> Douglas N. Greve, Ph.D.
>> MGH-NMR Center
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