Re: [Freesurfer] control point guidance

2012-01-30 Thread Bruce Fischl
Hi Mike can you tar and gzip a subject dir with strange results? All manually specified CPs are included. Then there is an initial intensity segmentation for stuff that is very likely to be wm, after-which there are a set of region-growing steps. That's actually the cortical one.The subcortical

Re: [Freesurfer] control point guidance

2012-01-30 Thread Michael Harms
Hi Bruce, Can you elaborate briefly on the 6-connected bit? e.g., if one places a CP manually in a voxel, and that CP is not face-connected on all sides to either other manually-placed CPs, or CPs determined automatically by FS, then it doesn't get counted as a CP after all? Is there any volume

Re: [Freesurfer] control point guidance

2012-01-27 Thread Bruce Fischl
Hi Mike it's a bit hard to state the region of effect for the control points. Essentially we go through and label voxels as control points or not based on their intensity, intensity gradient and connectivity (that is, the must be 6-connected to other control points) then build a Voronoi diagra

Re: [Freesurfer] control point guidance

2012-01-27 Thread Sabin Khadka
Hi Michael, I had the same problem too. It might be because of the type of scanner you are using. I added -washu_mprage flag, it pretty much helped me (I did not had to add a lot of controls points and so on so forth. You can go through the link below. https://mail.nmr.mgh.harvard.edu/pipermail//f

[Freesurfer] control point guidance

2012-01-27 Thread Michael Harms
Hi guys, We are currently trying to fix some errors in the white/pial surfaces where there are thin white matter strands by using control points, and are noticing a couple things: 1) The resulting WM surface in the area of the CPs can end up too far into the GM instead. Given that, is there any