Re: [Freesurfer] Gaussian curvature or Mean curvature

Dear Bruce Fischl I appreciate your explanation. Thank you. Best Wishes, Han On Mon, Oct 3, 2016 at 11:37 AM, Bruce Fischl wrote: > yes, I believe so > > On Mon, 3 Oct 2016, Hanbyul Cho wrote: > > Dear Bruce Fischl >> >> ?h.white.H, ?h.curv, and H Mean reflected

Re: [Freesurfer] Gaussian curvature or Mean curvature

yes, I believe so On Mon, 3 Oct 2016, Hanbyul Cho wrote: Dear Bruce Fischl ?h.white.H,  ?h.curv, and H Mean reflected the vector fields with 'sign(+ or -)', and MeanCurv reflected the integral of the 'absolute' value of mean curvature.  Am I understanding this correctly? Best Wishes, Han

Re: [Freesurfer] Gaussian curvature or Mean curvature

Dear Bruce Fischl ?h.white.H, ?h.curv, and H Mean reflected the vector fields with 'sign(+ or -)', and MeanCurv reflected the integral of the 'absolute' value of mean curvature. Am I understanding this correctly? Best Wishes, Han On Mon, Oct 3, 2016 at 7:49 AM, Bruce Fischl

Re: [Freesurfer] Gaussian curvature or Mean curvature

Hi Han I'm not sure I understand you question. The sign of the curvature depends on the arbirary convention you choose for the normal vector field over the surface. We pick and outwards pointing normal, which means that gyral regions in general have negative curvature (since they lie 'below'

Re: [Freesurfer] Gaussian curvature or Mean curvature

Dear FreeSurfer Team, I apologize for the repetitive questions. I made 2 labels which included bilateral paracentral lobule and sulcus regions. Then I extract the values: - MeanCurv After mris_anatomical_stats processing, I extracted the MeanCurv by the command, 'aparcstats2table

Re: [Freesurfer] Gaussian curvature or Mean curvature

Dear Bruce Fischl, Thank you for your help. Best Regards, Han Byul Cho On Fri, Sep 16, 2016 at 8:27 PM, Bruce Fischl wrote: > Hi Han > > the ?h.curv files are the mean curvature of the white matter surface with > a Gaussian smoothing kernel applied to it over

Re: [Freesurfer] Gaussian curvature or Mean curvature

Hi Han the ?h.curv files are the mean curvature of the white matter surface with a Gaussian smoothing kernel applied to it over space. The ?h.curv.pial is the same thing for the pial surface. The ?h.inflated.H is the (unsmoothed) curvature of the inflated surface, and the ?h.inflated.K is the

Re: [Freesurfer] Gaussian curvature or Mean curvature

Dear Bruce Fischl, Thank you for your explanation. I think I could not yet fully understand the 'curv' files. After processed this command, recon-all -s -i -all the output files were follow as, surf/?h.curv surf/?h.curv.pial surf/?h.inflated.H surf/?h.inflated.K I wonder all these output

Re: [Freesurfer] Gaussian curvature or Mean curvature

Hi Han the files ?h.curv contain the spatially smoothed mean curvature. You can compute the mean or Gaussian (or principal) curvatures of any surface using the mris_curvature command. cheers Bruce On Fri, 16 Sep 2016, Hanbyul Cho wrote: Dear FreeSurfer Team, I heard that FreeSurfer