Re: [Freesurfer] how to shrink WM surface in one region

2021-06-23 Thread Lara Foland-Ross
gain, Lara From: freesurfer-boun...@nmr.mgh.harvard.edu on behalf of Fischl, Bruce Sent: Wednesday, June 23, 2021 4:53 PM To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] how to shrink WM surface in one region Hi Lara Can you send us some pictures? The answer depends on why

Re: [Freesurfer] how to shrink WM surface in one region

2021-06-23 Thread Fischl, Bruce
Hi Lara Can you send us some pictures? The answer depends on why the white matter surface is settling at the wrong place Bruce -Original Message- From: freesurfer-boun...@nmr.mgh.harvard.edu On Behalf Of Lara Foland-Ross Sent: Wednesday, June 23, 2021 7:11 PM To: freesurfer@nmr.mgh.har

Re: [Freesurfer] how to shrink wm surface

2014-09-13 Thread Bruce Fischl
Hi Mike sorry, I never really documented it. Essentially they provide limits on the allowable intensities of the various tissue classes at the different boundaries (gray/white and pial). Unless those constraints are satisfied it will not try to place the boundary in that region cheers Bruce

Re: [Freesurfer] how to shrink wm surface

2014-09-12 Thread Matt Glasser
Have a look at mris_make_surfaces.c, this is how I learned about most of this stuff as the code is pretty well commented (and Bruce telling me things). Peace, Matt. On 9/12/14, 11:01 PM, "Harms, Michael" wrote: > >Hi Bruce, >I was wondering if there is info somewhere about what each of those 7

Re: [Freesurfer] how to shrink wm surface

2014-09-12 Thread Harms, Michael
Hi Bruce, I was wondering if there is info somewhere about what each of those 7 MIN_ and MAX_ variables control regarding the positioning of the white and pial surfaces? thanks, -MH -- Michael Harms, Ph.D. --- Conte Center for the Neurosci

Re: [Freesurfer] how to shrink wm surface

2014-09-09 Thread Bruce Fischl
Hi Andrea what is the background image? This is usually either a failure of the intensity normalization or of the surface deformation/segmentation to adaptively estimate the underlying intensity distributions of the gray/white matter. If you look in recon-all.log for that subject you will fin

Re: [Freesurfer] how to shrink wm surface

2014-09-09 Thread Krieger, Donald N.
mris_expand may do what you want. You can use it to shrink or expand the points on a surface by a fixed percentage or a fixed distance. Regards, Don Don Krieger, Ph.D. Department of Neurological Surgery University of Pittsburgh (412)648-9654 Office (412)521-4431 Cell/Text From: freesurfer-boun