[Freesurfer] bad pial surfaces

2011-08-30 Thread Reza Farivar
Hello, I've been banging my head against the wall and keyboard to get mris_make_surfaces generate correct pial surfaces. While the white matter surface looks okay for the most part, the pial matter surfaces almost never actually reach the pial surface, but rather stop very close to the white matte

[Freesurfer] pial surfaces totally off

2011-08-24 Thread Reza Farivar
Hello, I've tried a number of ways to generate pial surfaces for a monkey brain that has, to my eyes, very clear contrast. The white matter is segmented without too much pain and is mostly correct, but the pial surface never completely covers the gray matter. Instead, it either attaches to the whi

[Freesurfer] mris_expand not expanding

2011-07-29 Thread Reza Farivar
Hello, I've tried running mris_expand on several different surfaces, with or without the -thickness flag, and while it ends without error and creates the output file, the output looks identical to the input. I've tried even expanding by large amounts, large percentages of thickness values, but wit

[Freesurfer] surface appear dark in Freeview, inverted normals?

2011-06-03 Thread Reza Farivar
Good morning, I've constructed some monkey surfaces that actually look quite accurate, but appear dark in Freeview (they render normal in tksurfer). It really looks like the normals are inverted. Could that be the case? If so, how do I invert them? I know of non-freesurfer tools that can do this,

[Freesurfer] mri_convert with lists and orientations

2011-02-06 Thread Reza Farivar
, not the entire time series. Am I doing something wrong? Thanks, Reza |||||| Reza Farivar, Ph.D. Research Fellow Harvard Medical School Massachusetts General Hospital Dept. of Radiology Building 149, Room 2301 13th Street Charlestown, MA

[Freesurfer] tkmedit buttons grayed out

2010-01-31 Thread Reza Farivar
Hi, I'm trying to add control points to an anatomical using tkmedit, but the button to add control points is grayed out. While I can fool myself into thinking I've activated it by pressing "t", it actually doesn't add any control points. Any thoughts why? Thanks, Reza ___

[Freesurfer] resize (i.e., scale or stretch) a volume

2010-01-28 Thread Reza Farivar
Dear all, Is there an easy way to resize a volume, as in stretch it? I've gone the tkregister2 route of making a dat file and applying it with mri_convert (after converting to xfm) but for some reason it crops my volume, even when there's no good reason why it should. I'm hoping for a function or