Hi, I'm running the stable release v 3.0.1 for centos4 and I've had some problems with the segmentation. The main surface doesn't follow the wm-surface in some of the sulci, it rather 'jumps' across to the next gyri. (see picture) I've tried to edit the wm-surface and running autorecon2 again, but it doesn't work. Any ideas?
Thanks,
Martin Ystad University of Bergen, Norway.
Hi Martin,
can you show the orig surface also? This is probably due to a topological defect being incorrectly fixed. You can load the ?h.orig.nofix (or inflated.nofix) surface and read in the ?h.defect_labels curvature file to see if there was a defect in these regions. Does the white matter connect across the banks of the sulcus if you go forward and back a few slices? Or is it disconnected? The wm looks extremely bright there, not sure why. Did you pick any control points?
Bruce
On Tue, 11 Apr 2006, Martin Ystad wrote:
Hi, I'm running the stable release v 3.0.1 for centos4 and I've had some problems with the segmentation. The main surface doesn't follow the wm-surface in some of the sulci, it rather 'jumps' across to the next gyri. (see picture) I've tried to edit the wm-surface and running autorecon2 again, but it doesn't work. Any ideas?
Thanks,
Martin Ystad University of Bergen, Norway.
freesurfer@nmr.mgh.harvard.edu