Are you trying to dilate in 3D? If so, the mri_binarize will do it. Or are you trying to dilate along the surface?
On 12/2/2021 10:44 AM, Krieger, Donald N. wrote:
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Thanks for posting back, Bruce.
Mri_label2label –projabs N does work but only dilates normal to a surface.
What I’m trying to do is the following.
For cortical region X, I want to identify the sub-volume of each adjacent cortical region which is adjacent to region X. The idea is to dilate region X, say 5 mm, and then use sort and uniq to identify the xyz coordinates in the dilated X which are coincident with xyz coordinates in each adjacent region. It doesn’t matter if the dilated region X has lots of points in common with region X and I can see a brute force way to do what I want and can write it and contribute it to you if it would be helpful. I was just looking for a freesurfer tool or tool combination which does it. I think the idea of adjacent subregions is a useful one.
*From:* freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu *On Behalf Of *Fischl, Bruce *Sent:* Thursday, December 2, 2021 10:00 AM *To:* Freesurfer support list freesurfer@nmr.mgh.harvard.edu *Subject:* Re: [Freesurfer] howto create a .label files with dilated content
Hi Don
This is more Doug’s domain than mine, but won’t mri_label2label do the trick?
Cheers
Bruce
*From:* freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu *On Behalf Of *Krieger, Donald N. *Sent:* Thursday, December 2, 2021 8:38 AM *To:* 'freesurfer@nmr.mgh.harvard.edu' freesurfer@nmr.mgh.harvard.edu *Subject:* Re: [Freesurfer] howto create a .label files with dilated content
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Hi everyone,
I’m reposting this from November 29 as it hasn’t gotten a reply and it hasn’t shown up in the archive either so maybe it got lost in the sauce.
I wish to use the “-dilate n” capability of mri_extract_label, mris_label or other tool to dilate a ctx region and end up with an ascii list of xyz coordinates for the expanded points.
mri_extract_label appears to only be capable of writing output to .mgz files and I do not find a tool for extracting labels from a .mgz into an ascii .label file.
Your direction would be welcome.
Thanks - Don
Don Krieger, Ph.D.
Research Scientist
Department of Neurological Surgery
University of Pittsburgh
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
