There was a 3D Medical tutorial knocking about by Alias, that was done on a super hyper real level, They used the data from the Guy who donated himself to science and they cut him up into 1mm slices (does anyone remember).
The DVD shows how they used NURBS to create the main organs Heart. Lungs, Liver, Kidneys etc... and give a fly through of the mouth down the asophogus into the throat and onto the lungs etc... etc... etc...
Unfortunatly I cannot see it listed on Autodesks site.
Its called Medical Visualisations and it can be bought from here quite cheaply.
Chris (formerly R@nSiD)
When the power of love overcomes the love of power the world will truely know peace - Jimmy Hendrix
Winner SM VFX Challenge 1
3rd Place SM SteamPunk Challenge (May 2007)