目的：本研究開發－放射治療照野定位規劃與驗證輔助系統，其中包含虛擬實體模組及影像校準對位模組並以多媒體之介面環境操作。材料與方法：本系統是結合虛擬實境技術、電腦3D影像處理介面、逆向工程及醫學數位影像對位原理整合構成的一套定位規劃驗證技術並將其與直線加速器結合使用。本研究係使用全尺寸虛擬實境技術來建立放射腫瘤治療場景，並以三維重構技術取得患者人體3D數位影像及模型（真實尺寸），進一步結合放射治療模擬攝影室中真實的影像對位資訊，提供放射治療臨床治療上所需的三維定位資訊，提昇照野定位驗證之精度及方便性。結果：本研究開發之數位影像校準對位(Registration)模組可有效的進行對位與驗證。結論：本研究建立一套符合真實尺寸比例之放射治療照野定位規劃與驗證輔助系統，其具備適合醫師術前模擬定位、治療演練、及影像對位驗證之多種用途，除可提高放射治療之準確度，並可作為臨床醫師教學訓練之e化設備。

Purpose: A novel system for radiation treatment planning (RTP) positioning procedure is developed by integrating the full size virtual simulation module and computer aided image registration module operated under multimedia environment to assist the radiation treatment planning positioning procedure. Materials and Method: The novel system is developed by integrating the virtual reality technique, 3D computer image interface, reverse engineering and computer graphics theory. The full size solid virtual objects are reconstructed from CT slides in order to provide the real 3-dimension information to simulate and adjust the difference between the simulator and the linear accelerator. Results: The advantage of using this novel system is to provide the adjustment for difference between simulation patient position and treatment patient position Conclusion: With the assistance of this system, the simulation time will be decreased without sacrificing the accuracy of the positioning. This system developed in this study also can be a useful e-learning tool for c1inical studying and teaching.