Dear Corinna,

The reason for this is that the volumes correspond to two different analyses.

The volumes from the two sources are highly correlated, though, so it shouldn’t make almost any difference to use one or the other – but it you’re doing any analysis with the nuclei, I would use the one from the thalamic tool, for consistency.

Cheers,

/Eugenio

Juan Eugenio Iglesias

ERC Senior Research Fellow

Centre for Medical Image Computing (CMIC)

University College London

Research staff

Martinos Center for Biomedical Imaging

Massachusetts General Hospital and Harvard Medical School

Research Affiliate

Computer Science and Artificial Intelligence Laboratory (CSAIL)

Massachusetts Institute of Technology

http://www.jeiglesias.com

From: <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Corinna Bauer <corinnab83@gmail.com>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Monday, 17 December 2018 at 12:34
To: Mailing Freesurfer List <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] thalamus_proper or whole_thalamus volume measurement?

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Dear all,

For the new thalamus nuclei segmentation there is a measurement for the whole left and right thalami. The values are different from the thalamus_proper values.

Which output should be reported as the volume for the whole thalamus?

Thank you

Corinna