대한방사선치료학회지 (The Journal of Korean Society for Radiation Therapy)
- 제6권1호
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- Pages.89-93
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- 1994
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- 1598-8449(pISSN)
전자선에서 Virtual Source Distance의 위치 결정
Determination of the Virtual Focus Position for Electron Beam with Air Scanning
- Kwon Kyung Tea (Dept. of Therapeutic Radiology, Asan Medical Center) ;
- Youn Wha Ryong (Dept. of Therapeutic Radiology, Asan Medical Center) ;
- Park Kwang Ho (Dept. of Therapeutic Radiology, Asan Medical Center) ;
- Kim Chung Man (Dept. of Therapeutic Radiology, Asan Medical Center)
- 발행 : 1994.11.01
초록
Authors have measured virtual source distance of electron beam from CL/1800 medical linear accelerator, with newly designed method. Beam scanning was performed with the direction of beam axis in the air. Compared results between this study and well established in phantom measurement shows good agreement with in experimental error. And we have found that build-up cap plays very important role in air measurement because of charge build up. The method of in-air measurement of virtual source distance is very easy to set-up and generate accurate results.
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