Radiation Oncology Journal
- Volume 1 Issue 1
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- Pages.21-24
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- 1983
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- 2234-1900(pISSN)
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- 2234-3156(eISSN)
Change of Dose Distribution on the Beam Axis of 60Co γ Ray and 10MV X-Ray with Part Thickness
치료부위(治療部位)두께에 따른 Co-60 γ선(線)과 10MV X선(線)의 선축상(線軸上) 선량분포(線量分布)의 변화(變化)
- Kang, Wee Saing (Department of Radiology, College of Medicine, Seoul National University) ;
- Koh, Kyoung Hwan (Department of Radiology, College of Medicine, Seoul National University) ;
- Ha, Sung Whan (Department of Radiology, College of Medicine, Seoul National University) ;
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Park, Charn Il
(Department of Radiology, College of Medicine, Seoul National University)
- 강위생 (서울대학교 의과대학 방사선과학교실) ;
- 고경환 (서울대학교 의과대학 방사선과학교실) ;
- 하성환 (서울대학교 의과대학 방사선과학교실) ;
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박찬일
(서울대학교 의과대학 방사선과학교실)
- Published : 1983.10.30
Abstract
The thickness of the part being irradiated is finite. Percent depth dose tables being used routinely are generally obtained from dosimetry in a phantom much thickner than usual patient. At or close to exit surface, the dose should be less than that obtained from the percent depth dose tables, because of insufficient volume for backscattering. To know the difference between the true absorbed dose and the dose obtained from percent depth dose table, the doses at or close to the exit surface were measured with plate type ionization chamber with volume of 0.5ml. The results are as follows; 1. In the case of
Co
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