Progress in Medical Physics (한국의학물리학회지:의학물리)

Korean Society of Medical Physics (한국의학물리학회)
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Study on the Compatibility for an Ir-192 Source Manufactured by Korea Atomic Energy Research Institute (KAERI) in GammaMed Brachytherapy Machine

한국원자력연구소에서 개발한 Ir-192 선원의 감마메드 치료기 호환성 연구

  • Jeong, Dong-Hyeok (Department of Radiation Oncology, School of Medicine, Wonkwang University Hospital) ;
  • Lee, Kang-Kyoo (Department of Radiation Oncology, School of Medicine, Wonkwang University Hospital) ;
  • Kim, Soo-Kon (Kangwon University Hospital) ;
  • Moon, Sun-Rock (Department of Radiation Oncology, School of Medicine, Wonkwang University Hospital)
  • 정동혁 (원광대학교병원 방사선종양학과) ;
  • 이강규 (원광대학교병원 방사선종양학과) ;
  • 김수곤 (강원대학교병원 방사선종양학과) ;
  • 문성록 (원광대학교병원 방사선종양학과)
  • Received : 2010.02.04
  • Accepted : 2010.03.05
  • Published : 2010.03.31
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Abstract

The compatibility with GammaMed-12i brachytherapy machine for an Ir-192 encapsulated source (IRRS20, KAERI, Korea) manufactured by Korea atomic energy research institute (KAERI) has been investigated. As a mechanical testing of compatibility, precise measurement of step movement with channels, measurement of curvature of radius for wire, and emergency return testing were performed. Periodic measurements of air kerma strength for 45 days were carried out to evaluate decay characteristics of Ir-192 radioisotope and comparison of dose distributions in phantom between KAERI and old sources previously used were performed by film dosimetry. KAERI source has a good compatibility with GammaMed12i machine as a result of mechanical testing. There are in good agreement with calculated values in activity characteristics and there were small differences in dose distributions around the source in comparison between KAERI and old source.

본 연구에서는 한국원자력연구소에서 제작한 Ir-192 밀봉선원(IRRS20, KAERI, Korea)을 감마메드 근접치료기에 장착하고 치료기와의 호환성을 조사하였다. 기계적 호환성의 평가로서 선원의 이동간격, 채널별 이동간격, 와이어의 최소 곡률 반경, 비상시 작동을 검사하였다. 약 45일 동안 수회에 걸쳐 기준 거리에서 공기커마세기를 측정하였으며, 필름을 사용하여 기존의 선원과 선량분포를 비교하였다. KAERI 선원의 감마메드 장비와의 기계적호환성은 양호하였다. 시간에 따른 방사능 특성도 계산과 잘 일치하였으며, 선원주변의 선량분포에 있어서 기존 선원과 큰 차이를 보이지 않았다.

Keywords

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