[Freesurfer] Variability and randomness in algorithms

2007-02-02 Thread Bo Shi
Hi, Sorry to dredge up an old thread, I was curious about the details on where randomness is introduced in the following programs (beyond the normal floating points issues): > mris_smooth -seed 1234 > mris_sphere -seed 1234 > mris_fix_topology -seed 1234 > mris_ca_label -seed 1234 I assume t

[Freesurfer] wm and subcortical gray matter volumes

2006-10-12 Thread Bo Shi
I didn't want to clutter up one thread with two unrelated questions; Is there a quick way to get a total count for wm/gm volume and subcortical gray matter? AFAIK, the output is divided into a much finer structures... Thanks! ___ Freesurfer mailin

[Freesurfer] dilating/eroding wm volume

2006-10-12 Thread Bo Shi
Good morning! I have a dataset whose white matter volume is a bit too aggressive and I'd like to erode it a bit - is there a quick way to do this using tkmedit or one of the command line tools? Thanks, Bo ___ Freesurfer mailing list Freesurfer@nmr

Re: [Freesurfer] Skull marrow and skull stripping

2006-08-16 Thread Bo Shi
-16 at 15:50 -0400, Bruce Fischl wrote: > can you send an image without the aseg overlay? Is the wm darker there > than elsewhere (i.e. <110)? > On Wed, 16 Aug 2006, Bo Shi wrote: > > > Sorry, message cut off mid-write; > > > > We're having some trouble with t

Re: [Freesurfer] Skull marrow and skull stripping

2006-08-16 Thread Bo Shi
t. > > cheers, > Bruce > > > On Wed, 16 Aug 2006, Bo Shi wrote: > > > Hi Bruce, > > > > The pial surface for the top regions of the brain do fairly well in > > ignoring the marrow, however, the unwanted regions still get classified > > as gra

Re: [Freesurfer] Skull marrow and skull stripping

2006-08-16 Thread Bo Shi
Fischl wrote: > Hi Bo, > > does it affect your pial surface? You may be fine with just leaving it > in. > > cheers, > Bruce > On Wed, 16 Aug 2006, Bo Shi wrote: > > > Howdy - > > > > It seems that the skullstripping step is having some trouble