Not exactly because volumes are computed from soft segmentations rather than discrete labels, but yeah, it should be very close.
-- Juan Eugenio Iglesias http://www.jeiglesias.com From: Marco Ganzetti <marco.ganze...@biogen.com> Date: Tuesday, July 1, 2025 at 3:55 AM To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu> Subject: [Freesurfer] Re: eTIV in SynthSeg External Email - Use Caution Thanks. In SynthSeg, if I set a threshold at 0.5 on the segmentation output, should I get exactly the TIV? Label 0 is the background, therefore all the labels above 0 should constitute the TIV. Is this the case? Best, Marco From: Iglesias Gonzalez, Juan E. <jiglesiasgonza...@mgh.harvard.edu> Date: Tuesday, 1 July 2025 at 05:51 To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu> Subject: [Freesurfer] Re: eTIV in SynthSeg EXTERNAL SENDER The former! -- Juan Eugenio Iglesias http://www.jeiglesias.com From: Marco Ganzetti <marco.ganze...@biogen.com> Date: Monday, June 30, 2025 at 05:57 To: freesurfer@nmr.mgh.harvard.edu <freesurfer@nmr.mgh.harvard.edu> Subject: [Freesurfer] eTIV in SynthSeg External Email - Use Caution Dear, I would like to know how the eTIV is estimated in SynthSeg and SynthSeg+ . Is it a combination of CSF+ventricles+WM+GM masks? Or do you estimate is using the registration to MNI space approach? Best, Marco
_______________________________________________ Freesurfer mailing list -- freesurfer@nmr.mgh.harvard.edu To unsubscribe send an email to freesurfer-le...@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman3/lists/freesurfer@nmr.mgh.harvard.edu/ The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Mass General Brigham Compliance HelpLine at https://www.massgeneralbrigham.org/complianceline <https://www.massgeneralbrigham.org/complianceline> . Please note that this e-mail is not secure (encrypted). If you do not wish to continue communication over unencrypted e-mail, please notify the sender of this message immediately. Continuing to send or respond to e-mail after receiving this message means you understand and accept this risk and wish to continue to communicate over unencrypted e-mail.
