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 <[email protected]> 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" <[email protected]> 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 > [email protected] > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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