you can also do it with mri_volsynth mri_volsynth --temp yourfile.mgz --pdf const --val-a your val --o yournewfile.mgz

On 12/15/2022 9:12 AM, Huang, Yujing wrote:

Hi Aaron,

I think you can do this using mri_binarize (https://surfer.nmr.mgh.harvard.edu/fswiki/mri_binarize).

‘—min’ and ‘—max’ let you specify the intensity range of the voxels you would like include. Use ‘—binval’ specify the value to set for those voxels.

Hope this helps.

Best,

Yujing

*From:* freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu *On Behalf Of *Aaron Tanenbaum *Sent:* Wednesday, December 14, 2022 12:51 PM *To:* Freesurfer Freesurfer@nmr.mgh.harvard.edu *Subject:* [Freesurfer] create a mgz with one value

*        External Email - Use Caution *

Hello,

I am trying to generate a mgz with identical header and dimensions as another mgz file. However I would like all voxels to be set to one value. What is the best way to do this?

Thank you

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