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Hi

I found this tutorial helpful

https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/TopologicalDefect_freev...

I was able to correct a defect of similar size (18k+ vertices) corresponding to a “huge periventricular heterotopia” according to clinical colleague.

In particular the paint bucket with the option to fill multiple slices make it quite easier to paint in in the whole thing. Then save the image and run commands as in the tutorial.

Cheers, Marmaduke

From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu On Behalf Of Devika K Sent: Friday, January 31, 2020 5:38 AM To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] XL defect in recon-all

External Email - Use Caution Hi,

I am running recon-all on Freesurfer version 6. Few of my subject's have XL defect error as shown below.

CORRECTING DEFECT 0 (vertices=18408, convex hull=3300, v0=0) XL defect detected...

This has been running for more than a day.

How can I fix this error? Please give me some commands to solve this issue.

Looking forward to hearing from you

Thanks and Regards Devika K