Virtual bronchoscopy is an important application in modern medicine. The aim of this work is to establish a virtual bronchoscopy system that can examine the entire lung and assist physicians in detecting polygons inside the lung. It is separated two parts: preprocessing phase that used to construct human organ model based on the principal of CT medical imaging data, the run-time phase that used to simulate the several functions that can show the different procedure of surgery. The simulation

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... ults show that these key technologies can not only improve the computational performance, but also ensure the computing convergence and model integrity. It can satisfy the requirements between clinical, accuracy and realism of virtual surgery simulation. With the further development, it will widely applied clinic medical, assistant diagnoses and other fields.