Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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A Study on the Shielding of Iodine 131 Using Monte Carlo Simulation

몬테칼로 모사를 이용한 방사성옥소 I-131의 차폐체에 대한 효용성 연구

  • Jang, Dong-Gun (Dept. of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences Cancer Center) ;
  • Yang, Seoung-Oh (Dept. of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences Cancer Center) ;
  • Kim, Jung-Ki (Dept. of Radiation Safety Management, Dongnam Institute of Radiological & Medical Sciences Cancer Center) ;
  • Lee, Sang-Ho (Dept. of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences Cancer Center) ;
  • Choi, Hyung-Seok (Dept. of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences Cancer Center) ;
  • Bae, Cheol-Woo (Dept. of Radiation Safety Management, Dongnam Institute of Radiological & Medical Sciences Cancer Center)
  • 장동근 (동남권원자력의학원 핵의학과) ;
  • 양승오 (동남권원자력의학원 핵의학과) ;
  • 김정기 (동남권원자력의학원 방사선안전관리실) ;
  • 이상호 (동남권원자력의학원 핵의학과) ;
  • 최형석 (동남권원자력의학원 핵의학과) ;
  • 배철우 (동남권원자력의학원 방사선안전관리실)
  • Received : 2014.04.29
  • Accepted : 2014.05.30
  • Published : 2014.06.30
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Abstract

This study was designated to investigate the bremsstrahlung and radiation dose by beta rays. Radiation attenuation from I-131 treatment ward was analyzed using radio protective apron. Shielding materials which is included lead or water were simulated in Monte Carlo Simulation then the spectrum on interaction was analyzed. The shielding materials were categorized according to the thickness. 0.25mm and 0.5mm thick lead and 0.1mm and 0.2mm thick water shielding materials were configured in Monte Carlo Simulation for this study. Only lead shielding method and water plus lead shielding method were carried. As a results, when 0.5mm thick lead shielding method was performed, the radiation dose was similar to the results with water plus lead shielding method. In case of using 0.25mm thick lead shielding, the shielding effect was somewhat less. However, that shielding method cause dose reduction of about 60% compare with non-shielding material.

몬테칼로 모사를 이용하여 베타선으로부터 발생되는 제동복사선과 이로 인해 받는 선량을 비교 분석 하고자 하였으며, 방사선 차폐에 이용하는 납치마를 이용하여 실제 I-131 치료병실에서 발생되는 방사선의 감쇠정도를 비교하고자 하였다. 몬테칼로 모사를 이용하여 납 또는 물로 구성된 차폐체를 설정하여 베타선의 상호작용에 대한 스펙트럼을 분석하였으며, 납치마를 기준으로 0.25 mm 와 0.5 mm의 납 설정과 물 0.1 mm 와 0.2 mm를 설정하여 납만을 이용한 차폐방법과 물과 납을 두 가지를 이용한 차폐실험을 진행하였다. 실험 결과 납 두께 0.5 mm로 차폐 시 선량이 물과 납을 이용한 2차 차폐 방법을 사용했을 때와 유사하게 나타났으며, 납 0.25 mm 만을 사용했을 때 차폐효과가 다소 낮았지만, 납 차폐체가 없는 때의 선량에 비해 약 60% 감소효과를 나타냈다.

Keywords

Acknowledgement

Supported by : 미래창조과학부

References

  1. 핵의학기술학회 홈페이지 : http://www.ksnmt.or.kr
  2. 방사선안전관리통합정보망 : http://rasis.kins.re.kr
  3. Chang Guhn Kim, Dae-Weung Kim : Are Medical Personnel Safe from Radiation Exposure from Patient Receiving Radioiodine Ablation Therapy?, Nucl. Med. Mol. Imaging, 43(4), 259-279, 2009
  4. James C.S., Johen F., Iain R.M., et al : Radiation Safety in the Treatment of Patients with Thyroid Diseases by Radioiodine 131I: Practice Recommendations of the American Thyroid Association, Thyroid, 21(4), 335-346, 2011 https://doi.org/10.1089/thy.2010.0403
  5. James V, Hennessey, J. Anthony P., Rosemary K., Jeffrey R.G., Comments Regarding Practice Recommendations of the American Thyroid Association for Radiation Safety in the Treatment of Thyroid Disease with Radioiodine, Thyroid, Thyroid, 22(3), 336-338, 2011
  6. 한국동위원소협회 : 방사선 이론과 실제, 72, 2008
  7. James Tom Voss : Los Alamos Radiation Monitoring Notebook, National Registry of Radiation Protection Technologists, 2001
  8. Yong Hyun Chung, Cheol-Ha Beak, Seung-Jae Lee : Monte Carlo Simulation Codes for Nuclear Medicine Imaging, Med. Mol. Imaging, 42(2), 127-136, 2008
  9. S. Jan, G. Santin, D. Strul, et al : GATE - Geant4 Application for Tomographic Emission: a simulation toolkit for PET and SPECT, Phys. Med. Biol., 49(19), 4543-4561, 2004 https://doi.org/10.1088/0031-9155/49/19/007
  10. 대한방사선물리학연구회 : 방사선물리학, 226, 2006
  11. Lars Jodal : Beta emitters and radiation protection, Acta. Oncologica., 48, 308-313, 2009 https://doi.org/10.1080/02841860802245163
  12. University of Michigan : http://www.oseh.umich.edu/radiation/I131.shtml