Hi Steve, Thank you very much for the interest in our tool! Q1. Yes, mm^3. Q2. I’ll defer to Doug Greve (CCed) 😉 Cheers, /E

Juan Eugenio Iglesias Senior research fellow CMIC (UCL), MGH (HMS) and CSAIL (MIT) http://www.jeiglesias.com

From: freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Steve Petersen marfneuro@gmail.com Reply-To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu Date: Saturday, October 24, 2020 at 05:07 To: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] Hippocampal subfields questions

External Email - Use Caution Dear Eugenio,

Just two simple questions about hippocampal subfields:

Q1. The volume of each hippocampal subfield is exported in mm3?

Q2. I would like to compare hippocampal subfields volume measures between three groups by including the eTIV as covariate. Can I perform this group analysis by using the command line (with mri_glmfit command as for the thickness for example)?. In that case should I include some specific argument to consider in the analysis the hippocampal subfield stats of each subject?.

Thank you in advance.

Best,

Steve