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

2021-06-23 Thread Lara Foland-Ross
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 the white

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

2021-06-23 Thread Fischl, Bruce
@nmr.mgh.harvard.edu Subject: [Freesurfer] how to shrink WM surface in one region External Email - Use Caution Hi everyone, Very quick question - I need to shrink the white matter surface in a very specific (constrained) region. Can you please confirm that the right way to go about

[Freesurfer] how to shrink WM surface in one region

2021-06-23 Thread Lara Foland-Ross
External Email - Use Caution Hi everyone, Very quick question - I need to shrink the white matter surface in a very specific (constrained) region. Can you please confirm that the right way to go about this is to (1) manually remove voxels from the WM volume in freeview, then

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 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

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 mha...@wustl.edu wrote: Hi Bruce, I was wondering if there is info somewhere about what

[Freesurfer] how to shrink wm surface

2014-09-09 Thread Andrea Horváth
Dear Freesurfers, After running recon-all, the wm surfaces are too close to the pial surface, some gray matter is segmented as white matter as seen in the attached picture (red cross: a bigger cortical part is included in the white matter). How can I shrink the wm surface? Thank you for your

Re: [Freesurfer] how to shrink wm surface

2014-09-09 Thread Krieger, Donald N.
-boun...@nmr.mgh.harvard.edu [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Andrea Horváth Sent: Tuesday, September 09, 2014 7:08 AM To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] how to shrink wm surface Dear Freesurfers, After running recon-all, the wm surfaces are too close

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