We ran freesurfer 6.0 on some 0.8mm data and we are
seeing patches of cortex with very sparse vertex coverage. I'm
attaching an example (_fs60.png) showing a patch on the inferior bank of
the calcarine sulcus. This particular issue doesn't seem to occur in
freesurfer 5.3.0 (_fs530.png), which was run after downsampling anatomy
to 1.0mm.
Is this a known issue with 6.0? Is there a straightforward way to fix it?
Similarly,
in both versions we often see small "clumps" of really dense vertices
(*_fs60_zoomed.png). Is there anything we can do to clean these up?
For our application, we'd really like white-matter vertex spacing to be
as "regular" as possible.