Dear FS experts: I am writting to ask for help about the computation of global mean thickness. On the FAQ page, one suggestion is that the global mean thickness is equal to the (lh.thickness*lh.surfarea + rh.thickness.rh.surfarea) / (lh.surfarea+rh.surfarea). I am wondering how the ?h.thickness and ?h.surfarea are calculated. Any suggestions are appreciated. Thanks for your time.
Best Zhiliang Long
Hi Zhiliang
the thickness is the average of the min distance from gray-to-white and white-to-gray at each vertex. The surface area is the average area of the triangles attached to a vertex (divided by 3 I think).
cheers Bruce
On Sun, 13 Aug 2017, Zhiliang Long wrote:
Dear FS experts: I am writting to ask for help about the computation of global mean thickness. On the FAQ page, one suggestion is that the global mean thickness is equal to the (lh.thickness*lh.surfarea + rh.thickness.rh.surfarea) / (lh.surfarea+rh.surfarea). I am wondering how the ?h.thickness and ?h.surfarea are calculated. Any suggestions are appreciated. Thanks for your time.
Best Zhiliang Long
Hi Bruce Thanks very much for your suggestion. Just one more question that I am confused with. Is the surface area calculated based on the white matter surface or pial surface ? Thanks for your time.
Best Zhiliang
At 2017-08-13 22:47:07, "Bruce Fischl" fischl@nmr.mgh.harvard.edu wrote:
Hi Zhiliang
the thickness is the average of the min distance from gray-to-white and white-to-gray at each vertex. The surface area is the average area of the triangles attached to a vertex (divided by 3 I think).
cheers Bruce
On Sun, 13 Aug 2017, Zhiliang Long wrote:
Dear FS experts: I am writting to ask for help about the computation of global mean thickness. On the FAQ page, one suggestion is that the global mean thickness is equal to the (lh.thickness*lh.surfarea + rh.thickness.rh.surfarea) / (lh.surfarea+rh.surfarea). I am wondering how the ?h.thickness and ?h.surfarea are calculated. Any suggestions are appreciated. Thanks for your time.
Best Zhiliang Long
By default the white matter, but you can compute the pail area if you want Cheers Bruce
On Aug 13, 2017, at 8:21 PM, Zhiliang Long 15756307968@163.com wrote:
Hi Bruce Thanks very much for your suggestion. Just one more question that I am confused with. Is the surface area calculated based on the white matter surface or pial surface ? Thanks for your time.
Best Zhiliang
At 2017-08-13 22:47:07, "Bruce Fischl" fischl@nmr.mgh.harvard.edu wrote:
Hi Zhiliang
the thickness is the average of the min distance from gray-to-white and white-to-gray at each vertex. The surface area is the average area of the triangles attached to a vertex (divided by 3 I think).
cheers Bruce
On Sun, 13 Aug 2017, Zhiliang Long wrote:
Dear FS experts: I am writting to ask for help about the computation of global mean thickness. On the FAQ page, one suggestion is that the global mean thickness is equal to the (lh.thickness*lh.surfarea + rh.thickness.rh.surfarea) / (lh.surfarea+rh.surfarea). I am wondering how the ?h.thickness and ?h.surfarea are calculated. Any suggestions are appreciated. Thanks for your time.
Best Zhiliang Long
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Dear FS experts,
I met an error when I try to run mris_preproc. Actually i succeeded this command with my own scripts and fsgd files before. There are 2groups with one covariates but I keep getting this error like below. mris_preproc --fsgd TESTTEST_age_only.fsgd --hemi lh --meas thickness --target fsaverage --fwhm fwhm10 --o lh.thickness_age.s10.mgh ERROR: no subjects specified
I attached my fsgd file.
This fsgd file was made using emacs.
Regards,
Hyon-Ah Yi.
please send error and all terminal output
On 08/14/2017 12:47 AM, Yi, Hyon-Ah wrote:
Dear FS experts,
I met an error when I try to run mris_preproc. Actually i succeeded this command with my own scripts and fsgd files before. There are 2groups with one covariates but I keep getting this error like below. mris_preproc --fsgd TESTTEST_age_only.fsgd --hemi lh --meas thickness --target fsaverage --fwhm fwhm10 --o lh.thickness_age.s10.mgh ERROR: no subjects specified I attached my fsgd file. This fsgd file was made using emacs. Regards, Hyon-Ah Yi.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
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Bruce Fischl -
Douglas N Greve -
Yi, Hyon-Ah -
Zhiliang Long