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 <subject> -i <input file> -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 files contained 'spatially smoothed mean curvature'.
Could I know that the meaning of 'spatially smoothed' ? Are these output files difference from the output of 'mris_curvature' command?
I saw the values that stats/?h.aparc.stats and stats/?h.aparc.a2009s.stats contained the 'integrated rectified Mean curvature' and 'integrated rectified Gaussian curvature'.
I wonder these values were if the average curvature of vertices in each region, or other computed values using different atlas parcellation level.
I appreciate your help.
Best Wishes,
Han.
On Fri, Sep 16, 2016 at 4:37 PM, Bruce Fischl fischl@nmr.mgh.harvard.edu wrote:
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 could calculate the Gaussian curvature and Mean curvature by vertex level.
Do the computed curvature values be saved as the subject/surf/lh.curv or rh.curv files?
When I prepared the generated mass-univariate data, I used the mris_preproc with [--meas curv] option, not [--meas thickness].
mris_preproc --qdec-long qdec.table.dat --target study_average --hemi lh --meas curv--out lh.curv.mgh
I wonder this option is right usage to analyze the cortical curvature. And I wonder the 'curv' is what specific value is meaning.
If I want to designate the specific curvature values(Gaussian or Mean curvature ) to analyze by vertex level, how can I use the [--meas] option?
Thank you,
Best wishes,
Han.
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