Thank you Bruce!
I will try sampling 1mm above and bellow the surface using mri_vol2surf --projdist mmdist -1 and --projdist mmdist 1, and trilinear interpolation. Should also check that I'm not sampling beyond the grey matter... roberto
On Mon, Jun 1, 2009 at 5:49 PM, Bruce Fischl fischl@nmr.mgh.harvard.edu wrote:
Hi Roberto, you are probably better off using the surfaces for this. You can sample inside and outside the gray/white surface and compute the contrast that way using mri_vol2surf.
cheers, Bruce
On Mon, 1 Jun 2009, roberto toro wrote:
Dear Freesurfers, Reading the surface segmentation paper, Dale et al 1999, it says that in freesurfer the grey/white matter boundary is detected first based on voxel intensity, and then by fitting locally a plane of list variance. Is there a way to use that data to assess how clear cut the grey/white border is? For example, to distinguish the superior temporal gyrus, which has often a very distinct GM/WM border, from the precentral gyrus, which is often more blurry? thank you in advance! roberto _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer