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Hi John,

Currently, the default transformation model is "deform". Could you check if 
"affine" yields a better result?

mri_synthmorph -m affine fa.nii.gz template.nii.gz -o fa_in_MNI.nii.gz

Cheers,
Malte

________________________________________
From: freesurfer-boun...@nmr.mgh.harvard.edu 
<freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of John Anderson 
<jb19790...@gmail.com>
Sent: Friday, September 1, 2023 12:45
To: Freesurfer support list
Subject: [Freesurfer] mri_synthmorph

        External Email - Use Caution

Dear Freesurfer experts,
I processed DTI data using dt_recon, and I want to register FA images to the 
standard MNI152 space. However, after running the command
mri_synthmorph fa.nii.gz template.nii.gz -o fa_in_MNI.nii.gz,

the registration is not accurate. I'm not sure what I've done wrong. Thank you 
for any guidance.

sincerely
J


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