No, you'll have to add it as a covariate. Or you can add --etiv when you run mris_preproc and it will divide the maps by the eTIV

On 11/25/2020 3:23 PM, Sara Lyn wrote:

External Email - Use Caution

Hi Freesurfer experts,

I'm doing a surface based volume analysis and wanted to know if there was a flag to regress out eTIV in the model.

Thank you

_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edumailto:Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer