Re: [Freesurfer] Strange Segmentation

Dear Arkadiy,

I see sometimes these kind of errors. I think they are caused by local mis-segmentation due to WM hypointensities (enlarged perivascular spaces or other lesions, usually benign) located just under GM. Sometimes it is hard to discern where it is a hypointensity and where it is just a sulcus. I recommend to assess them using all 3 slice orientations. I correct them by editing wm.mgz (filling in voxels by value 255).

Regards,

Antonin Skoch

Dear Experts, This brain looks a little bit strange to us, and I was wondering if someone might be able to chime in about whether this is worth editing, based on the screenshots of different slices from the sagittal view.. Thank you for your expertise. -Arkadiy