External Email - Use Caution

Hello FreeSurfer Developers,

I use Freesurfer 6 on macOS Sierra 10.12.6. In several subjects, I found midline cutting error, that is the midline does not go through exactly the center of the brain in coronal cut. For example, the midline is a little bit fuzzy and goes through an hemisphere than the other (see attachment). I've searched in the mail list and I don't find the way to fix it. Does anyone have any idea to fix it?

Thank you,

Maxime Perron