Radiation Oncology Journal
- 제6권1호
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- Pages.109-116
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- 1988
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- 2234-1900(pISSN)
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- 2234-3156(eISSN)
Alcyon Co-60 감마선의 전자오염
Contamination of an Alcyon Co-60 Gamma rays by Electrons
- 유명진 (부산대학교 의과대학 치료방사선과학교실) ;
-
김동원
(부산대학교 의과대학 치료방사선과학교실)
;
- 김철수 (인제의대부속 부산백병원 치료방사선과학교실) ;
- 정운혁 (부산대학교 자연과학대학 물리학과학교실)
- Yoo Meong-Jin (Department of Therapeutic Radiology, Pusan National University Hospital) ;
-
Kim Dong-Won
(Department of Therapeutic Radiology, Pusan National University Hospital)
;
- Kim Chul-Soo (Department of Radiation Oncology, Pusan Paik Hospital) ;
- Chung Woon-Hyuk (Department of Physics, Pusan National University)
- 발행 : 1988.06.01
초록
The Alcyon Co-60 gamma rays was studied for electron contamination. The surface dose, attributable almost entirely to contamination electrons, has a linear dependence on field width for square fields and an inverse square dependence on distance from the bottom of the fixed head assembly Build-up and surface dose measurements were taken with and without an acrylic blocking tray in place. Further measurements were made with a copper filter designed to reduce secondary electrons emitted by photon interactions with the acrylic tray. The results are discussed in relation to skin sparing effect for radiation therapy Patients. And to achieve the maximum skin sparing effect, the selection of the optimum SSD and TSD is needed.