Sorry for the late response, I went on vacation the very same day you posted your question.

The floating image is the one you want to deform, and the reference image is the one you use as target for the registration /deformation. In other words: the deformed floating image should overlap with the reference image.

More information here:

https://surfer.nmr.mgh.harvard.edu/fswiki/EasyReg

Kind regards,

/Eugenio

--

Juan Eugenio Iglesias

http://www.jeiglesias.com

From: <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of "Peters, Johnny Y" <jonathan-peters@uiowa.edu>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Friday, February 10, 2023 at 11:40
To: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] mri_easyreg tool

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Hello FreeSurfer Developers,

I'm attempting to use the mri_easyreg on the developmental version of freesurfer but I am confused about what .mgz or .nii(.gz) I am supposed to use for the reference image, floating image, and the others. I saw no previous threads on the mailing list addressing my question so I decided to email you. Would you be able to give an example command line using the subject bert in the freesurfer directory?

Thank You