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Hello FreeSurfer developers,
I'm having an odd problem using freeview. When I open a set of volumes (wm
and brainmask) and surfaces (both pial and white), everything seems to work
fine. However, when I turn off the volumes to look at the 3D view and then
turn them back on when switching back to 2D, the situation in Screenshot1
happens. The brainmask volume disappears in the coronal and axial planes
but is still there in the sagittal. Also, it looks like a coordinate
appears in large text written backwards superimposed over the surface
outlines (mirrored, not just in reverse order), but it's not the coordinate
from the current slice. For instance, this coronal slice says R 97.66 and
the axial slice says R 147.65. If I zoom in or out, the numbers get larger
and smaller. The white matter volume is not affected. Everything works
normally if I keep the volumes for viewing 3D rendering.
I have a similar thing happen when adding control points (it first happened
when creating a new set, but if I load an existing set it happens also).
The image is fine until I get to a specific coronal slice (usually just a
few slices away from where I put the first control point), then the
brainmask volume disappears in the coronal view but is still there in
sagittal and axial. This time the displayed number is A 58.73 (mirrored),
which is actually the label on the exact slice where brainmask disappears
for this subject, but this number does change sometimes when scrolling
through slices, but not on most slices and it doesn't change to match the
current label.
If I close and re-open freeview with the same set of volumes and surfaces,
they come up the way they should and remain as they should unless I turn
off the volumes while looking at the 3D rendering or open the control point
file again.
This has happened for multiple subjects/sets of files, and no messages
appear in the terminal when this happens. I'm using a Linux with CentOS 6.9.
Any idea what could be causing this and/or how to fix it?
Thanks!
Rachel