3B. Geiger and R. Kikinis. Simulation of endoscopy. In Nicholas Ayache, editor, Computer Vision, Virtual Reality and Robotics in Medicine, Lecture Notes in Computer Science[M], pages 276～282. Springer-Verlag, April 1995.
4E. Gobbetti, P. Pili, A. Zorcolo, et al. Interactive Virtual Angioscopy. Proc. of IEEE Visualization[C], 1998:435～438.
5G. R. Ferretti, D. J. Vining, J. Knoplioch, et al. Tracheobronchial tree: Three - dimensional spiral CT with bronchoscopic perspective[J ]. Journal of Computer Assisted Tomography, 1996;20(5): 777～781.
6J. Rodenwaldt, L. Kopka, R. Roedel, et al. 3D virtual endoscopy of the upper airways: Optimization of the scan parameters in a cadaver phantom and clinical assessment[J ]. Journal of Computer Assisted Tomography, 1997; 21(3) :405～411.
7K. Darabi, K. D. M. Resch, J. Weinert, et al. Real and simulated endoscopy of neurosurgical approaches in an anatomical model[J]. Lecture Notes in Computer Science, 1997; 1205:323～326.
8W. Lorensen, F. Jolesz, and R. Kikinis. The exploration of cross -sectional data with a virtual endoscope[ A]. R. Satava and K.Morgan (eds.). Interactive Technology and New Medical Paradigm for Health Care[C], IOS Press, 1995; 221～230.
9D. Bartz and M. Skalej. VIVENDI - A virtual ventricle endoscopy system for virtual medicine. Symposium on Visualization[C], 1999.
10R. Yagel, D. Stredney, G. J. Wiet, et al. Building a virtual environment for endoscopic sinus surgery simulation [ J ]. Computers and Graphics, 1996; 20(6) :813～823.
