Interactive Virtual Endoscopy System
ZHANG Hui 1) , SHU Hua zhong 1) , PASCAL Haigron 2) , LUO Li min 1) 1) (Lab. of Image Science and Technology, Dept. of BioMedical Engineering, Southeast University, Nanjing 210096) 2) (Lab. of Treatment of Signal and
Technique of computer graphics and virtual reality, applied to medical endoscopy system, come up to a new virtual medical image application: virtual endoscopy. In order to apply virtual reality technique into medical image processing, make convenient for surgeons to access virtual and mini invasive surgery, this paper, presents a full interactive virtual endoscopy system framework, analyzing and discussing system architecture and algorithm models. We explain some key procedures in virtual endoscopy system such as definition of world coordinate, virtual camera, surface detection, normal approximation, volume rendering and surface rendering, and also some interactive control method. And also we put forwards some new methods such as object cache method and extended volume growing method to solve the problems encountered in system, such as real time volume rendering and accurate and smooth image result. Then we applied it in medical image processing, following satisfied result. This improves that these methods are useful and effective. Our system provides an effective tool for medical image visualization, successfully fulfilled the aim of real time displaying and good result in virtual realty and visualization application. It has certain practical meanings in algorithms and system analysis.