Problems and Opportunities: Guidant is a world leader
in the design and development of cardiovascular medical products.
Models were provided for four different human hearts for which
CAD models were needed. A very high level of detail capture was
necessary
Downstram Application: An iges128 (Nurbs) CAD model was
required. Initially the CAD models were to be brought into Alias
for study and analysis, and subsequently into ProEngineer
for mold creation.
Solution:
1.Original Model. This
model was scanned with our proprietary system and a high
density polygon mesh was created.
2. The polygonized mesh
was brought into our CAD system and organized into 2,039
patches in preparation for Nurbs Surfacing.
3. A Nurbs surface (iges128)
was generated. The Nurbs surface is "watertight"
and all patch boundaries are tangent.
4. The Nurbs surface with
patch boundaries shown
5. The Nurbs surface has
been interrogated for fidelity with the polygonized mesh
and a color map generated. All Nurbs patch areas shown as
grey are within .05mm (.002 inches) of the
polygonized mesh.
