mri_mc should do the trick
Cheers
Bruce 

P.s. it is a marching cubes tessellation algorithm. You could also try mri_tessellate 



On Oct 1, 2012, at 10:10 PM, Efrat Kliper <e.kliper@gmail.com> wrote:

Dear FreeSurfer Users,

I have created a binary mask for the hippocampi and now i want to create the 
triangulated surfaces of the  hippocampi?
An one know how to do it? 

Thanks,
Efrat

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