Re: [Freesurfer] Measuring total cortical volume

This is computed by computing the volume inside the pial surface and subtracting the volume inside the white surface (and accounting for small amounts in the "unknown" region). doug

On 07/17/2012 04:47 AM, Emelie Andersson wrote:

Thank You Douglas,

May I ask if You know how the numbers were calculated?

best regards Emelie

On Mon, Jul 16, 2012 at 6:11 PM, Douglas N Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> wrote:

In the aseg.stats file, there will be these values

# Measure lhCortex, lhCortexVol, Left hemisphere cortical gray matter
volume, 218425.204942, mm^3
# Measure rhCortex, rhCortexVol, Right hemisphere cortical gray matter
volume, 212261.052152, mm^3
# Measure Cortex, CortexVol, Total cortical gray matter volume,
430686.257094, mm^3

does this work for you?
doug


On 07/16/2012 03:17 AM, Emelie Andersson wrote:
> Hello,
>
> We have a some doubts about how to measure the total cortical
volume.
> Is it recommendable to use GM = pial surface - white matter?
>
> Hope to hear from You,
>
> Best regards
> Emelie
>
>
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
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