Progress in Medical Physics (한국의학물리학회지:의학물리)

Korean Society of Medical Physics (한국의학물리학회)
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Dosimetric Measurement for 4MV X-Ray Linear Accelerator with Asymmetric Collimator System

4MV 선형가속기에서의 비대칭 콜리메이터의 선량측정

  • 이병용 (아산재단 서울중앙병원 치료방사선과, 울산대학교 의과대학 치료방사선과학교실) ;
  • 최은경 (아산재단 서울중앙병원 치료방사선과, 울산대학교 의과대학 치료방사선과학교실) ;
  • 장혜숙 (아산재단 서울중앙병원 치료방사선과, 울산대학교 의과대학 치료방사선과학교실)
  • Published : 1990.10.01
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Abstract

Dosimetric measurement of an asymmetric collimator system was performed, using water phantom system for 4MV X-ray linear accelerator. We have studied the system of dose calculation with those measured result. We compared the field size factor and the percent depth dose for asymmetric collimator to those factor for symmetric fields. The results show that we can use symmetric field data directly within 1% error, if we consider the off axis ratio(OAR).

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