Progress in Medical Physics (한국의학물리학회지:의학물리)

Korean Society of Medical Physics (한국의학물리학회)
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Evaluation of Dose Distribution Using a Radiophotoluminescence Glass Dosimeter in Biobeam8000 Gamma Irradiation Device

유리선량계를 이용한 Biobeam8000 감마선 조사장치의 선량평가

  • Shin, Sang-Hun (Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences) ;
  • Lee, Sung-Hyun (Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences) ;
  • Son, Ki-Hong (Department of Radiation Oncology, Samsung Medical Center) ;
  • Lee, Hyun-Ho (Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences) ;
  • Kim, Kum-Bae (Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences) ;
  • Jung, Hai-Jo (Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences) ;
  • Ji, Young-Hoon (Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences)
  • 신상훈 (한국원자력의학원 방사선치료연구센터) ;
  • 이성현 (한국원자력의학원 방사선치료연구센터) ;
  • 손기홍 (삼성서울병원 방사선종양학과) ;
  • 이현호 (한국원자력의학원 방사선치료연구센터) ;
  • 김금배 (한국원자력의학원 방사선치료연구센터) ;
  • 정해조 (한국원자력의학원 방사선치료연구센터) ;
  • 지영훈 (한국원자력의학원 방사선치료연구센터)
  • Received : 2011.11.24
  • Accepted : 2011.12.19
  • Published : 2011.12.30
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Abstract

Gamma irradiator is widely used for cell, animal experiment, irradiation for blood, dose measurement, and education. Biobeam8000 gamma irradiator (STS Steuerungstechnik &. Strahlenschutz GmbH, Braunschweig, Germany, Cs137, 81.4 TBq) that KIRAMS (Korea Institute of Radiological and Medical Science) has is a irradiation device that enables to be used in large-capacity of 7.5 L and extensive area. Cs-137 source moves range of 24 cm back-and-forth in a regular cycle in beaker for uniform irradiation and a beaker that puts a specimen like existing radiation irradiator such as Gammacell3000 rotates $360^{\circ}$ during irradiation. Precise dose information according to the location of radiation source would be needed because of the movement of radiation source, whereas radiation could be uniformly irradiated in comparison with existing gamma irradiator. In this study, dose distribution of the inside beaker located in Biomeam8000 gamma irradiator was measured using glass dosimeter, and dose evaluation and distribution regarding dose linearity and dose reproducibility were implemented based on measurement results. This aims to show guideline for efficient use of irradiator based on measurement result when doing experiment or radiation exposure.

감마선조사장치는 세포실험, 동물실험, 혈액방사선 조사, 선량측정 실험 및 교육 등에 널리 사용되고 있다. 한국원자력의 학원에서 보유하고 있는 Biobeam8000 (STS Steuerungstechnik &. Strahlenschutz GmbH, Braunschweig, Germany, Cs-137, 81.4 TBq) 감마선 조사장치는 7.5 L의 대용량과 넓은 영역에 사용이 가능한 감마선 조사장치이다. 비커 내부에 균일한 방사선조사를 위해 Cs-137 선원이 위아래 24 cm 범위를 일정한 주기로 왕복 이동하며, 기존의 다른 감마선 조사기와 같이 시료를 넣는 비커는 방사선 조사동안 360도 회전한다. 기존의 감마선 조사기와 달리 비교적 균일한 선량이 조사되는 반면에 방사선원이 이동하므로 위치에 따른 구체적인 선량정보도 필요로 하게 된다. 본 연구에서는 유리 선량계를 이용하여 Biobeam8000 감마선 조사장치의 비커 내부 선량을 측정하였고, 측정결과를 바탕으로 선량선형성과 선량재현성에 대한 평가 및 선량분포의 정보를 도출하였다. 이 결과를 바탕으로 실험 및 방사선 조사 시 효율적인 조사장치 사용을 위한 가이드라인을 제시하고자 한다.

Keywords

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