CompuServe Messages

I'm tracing CT scans and lofting them. Tracing programs would help if I didn't have to end up with a specific vertex count at each level. Its easier for me now to use Corel to manually trace over the scans and then copy the tracing to the next level and adjust it to the next scan. I've modeled the human nasal sinuses this way, took me months and ended up with 100,000 vertexes. Its being used to train sinus surgeons (I'm one) using stereo renderings and models of instruments in conjunction with stereoscopic video tapes of operations and cadaveric dissections. Next is the middle and inner ear, its complicated and I'm hoping not to take 6 months to model it too. The voxel reconstructoin programs for CT scans are out there but you can't animate mucous flow, cilia motion or blood vessels on them. Thanks for any help, I hear Corel 6.0 may have some tools that will help, plus I hope to run it on my new Alpha. Maybe 3DS NT will have different tools.