Hi, I need build nurbs model based on 3d scan. I imported obj to MoI with script. I would like build shape lines based on 3d scan geometry. How to do it simpliest to know that line has got same shape as original 3d scan (triangles without loops). I need to rebuild only few 2d shapes (like subd retopo in Modo).

Edit:
I know there are tools like:
http://www.rapidform.com/products/xos/overview/
http://www.vrmesh.com/products/reverse.asp
http://www.egsolutions.com/en/product/software/leios/caratteristiche/1625/2713/3012/#.VM9_NWiG_Ak

I`m looking to how do it manually in MoI