한국의학물리학회:학술대회논문집 (Proceedings of the Korean Society of Medical Physics Conference)
- 한국의학물리학회 2002년도 Proceedings
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- Pages.446-449
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- 2002
Development of Electronic Portal Imaging Device and Treatment Position Verification for Fractionated Stereotatic Radiotherapy
- Lee, Dong-Hoon (Lab. of radiation effect, Korea Cancer Center Hospital) ;
- Ji, Young-Hoon (Lab. of radiation effect, Korea Cancer Center Hospital) ;
- Lee, Dong-Han (Lab. of radiation effect, Korea Cancer Center Hospital) ;
- Kim, Yoon-Jong (Dept. of Electronic Eng. Inha University) ;
- Chilgoo Byun (Lab. of radiation effect, Korea Cancer Center Hospital) ;
- Hong, Seung-Hong (Dept. of Electronic Eng. Inha University) ;
- Rhee, Soo-Yong (Dept. of Physics, College of Science, Hanyang University)
- 발행 : 2002.09.01
초록
The video based electronic portal imaging device (EPID), which could display the portal image in near real time, was implemented to verify treatment position error in FSRT(Fractionated Stereotatic Radiation Therapy) instead of a portal film. Also, Developed FSRT system was composed of the stereotactic frame, frame mounting system and collimator cones. The verification of treatment position is very crucial in special therapies like FSRT. In general, the FSRT uses high dpse rate at small field size for treating small intracranial lesions. To evaluate quantitative positioning errors in FSRT, we used the first FSRT image as reference image and obtained the second FSRT image that was moved 2mm intentionally and detected intracranial contours after image processing. The generated 2mm error could be verified by overlapping only contours of two images. Through this study, the radiation treatment efficiency could be improved by performing precise radiation therapy with a developed video based EPID and FSRT.