On 3/4/19 10:11 AM, Hengameh Marzbani wrote:

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Hi Freesurfers,

I want to do group analysis on four groups and use the volume values in aseg,stats. 1- Is it correct that each subcortical segmentation is based on a "volumetric segmentation atlas" created by Freesurfer?

Yes

2- Are the volume values expressed in the space of this atlas?

No, they are in native space units.

3- Can I compare these absolute values between 4 groups ?

Yes.

4- Should I apply correction to the volume measures by eTIV (also called ICV)?

Probably so, but you should know better than us

Thanks you in advance!

Best regards, Hengameh

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