you can reference this one
http://www.ncbi.nlm.nih.gov/pubmed/17011792


  Smoothing and cluster thresholding for cortical surface-based group
  analysis of fMRI data.

Hagler DJ Jr
<http://www.ncbi.nlm.nih.gov/pubmed/?term=Hagler%20DJ%20Jr%5BAuthor%5D&cauthor=true&cauthor_uid=17011792>^1
, Saygin AP
<http://www.ncbi.nlm.nih.gov/pubmed/?term=Saygin%20AP%5BAuthor%5D&cauthor=true&cauthor_uid=17011792>,
Sereno MI
<http://www.ncbi.nlm.nih.gov/pubmed/?term=Sereno%20MI%5BAuthor%5D&cauthor=true&cauthor_uid=17011792>.



On 05/03/2016 09:03 AM, Francesca Strappini wrote:
> Thank you!
> Is there a paper I can read as a reference?
>
> 2016-05-03 15:53 GMT+03:00 Bruce Fischl <fischl@nmr.mgh.harvard.edu
> <mailto:fischl@nmr.mgh.harvard.edu>>:
>
>     Hi Francesca
>
>     what's the difference? They are both approximations of Gaussians
>     on the
>     surface. We use iterative averaging which is a numerical
>     approximation of
>     a surface-based Gaussian.
>
>     cheers
>     Bruce
>
>
>     On Tue, 3 May 2016, Francesca Strappini wrote:
>
>     > Hi all,
>     >
>     > I would like to know which model has been implemented for the
>     surface-based
>     > spatial smoothing in Freesurfer (for example in mri_vol2surf).
>     Heat kernel
>     > smoothing and/or diffusion smoothing?
>     >
>     > Thank you
>     > Best
>     >
>     > Francesca
>     >
>     > --
>     > Francesca Strappini, Ph.D.
>     > Neurobiology Department
>     > Weizmann Institute of Science
>     > 234 Herzl Street, Rehovot 7610001 Israel
>     > Tel.: +972 58 444 2584 <tel:%2B972%2058%20444%202584>
>     > E-mail: francesca.strappini@weizmann.ac.il
>     <mailto:francesca.strappini@weizmann.ac.il>
>     >
>     >
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> --
> Francesca Strappini, Ph.D.
> Neurobiology Department
> Weizmann Institute of Science
> 234 Herzl Street, Rehovot 7610001 Israel
> Tel.: +972 58 444 2584
> E-mail: francesca.strappini@weizmann.ac.il
> <mailto:francesca.strappini@weizmann.ac.il>
>
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