| Summary: | 碩士 === 國立成功大學 === 工業設計學系碩博士班 === 93 === The objective of this research is to develop an algorithm to simulate the mesh cutting procedure in Laparoscope Surgeries. The new idea is to use mesh to simulate the membranes which surround organs. It is different from some conventional methods, which use solid models to represent organs. However, the virtual solid models are suppressed by the pressure of CO2, which is used to inflate the abdominal wall to generate a dome-shape space for laparoscope surgery. That means doctors cannot see entire organs most of time during the surgical procedures. Therefore, we plan to use mesh to simulate membranes and some surfaces of organs instead of building and simulating entire organ models.
We use a mesh with 29x29 vertices on the top of several spherical obstacles to model part of human abdominal environment. Vertices of the mesh are affected by four different forces such as spring force, gravity force, damping force, and force from CO2 pressure respectively. Several vertices of the mesh are fixed to avoid the mesh slip away. And then we simulate the cutting procedures by adding extra same vertices at the cutting position. Repeat the same steps along the cutting path until the process stops.
The algorithm is successfully implemented and proved to be very efficient and fast in laparoscope surgical simulation. It also provides a new way for modeling organs inside human abdominal. The algorithm can be further improved to clothes design and consumer product form design, etc.
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