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Organ Dose Assessment of Nuclear Medicine Practitioners Using L-Block Shielding Device for Handling Diagnostic Radioisotopes

진단용 방사성동위원소 취급 시 L-block 차폐기구 사용에 따른 핵의학 종사자의 장기 선량평가

  • Kang, Se-Sik (Dep. of Radiological Science, College of Health Science, Catholic University of Pusan) ;
  • Cho, Yong-In (Dept. of Diagnostic Radiology, Dongnam Institute of Radiological & Medical Science) ;
  • Kim, Jung-Hoon (Dep. of Radiological Science, College of Health Science, Catholic University of Pusan)
  • 강세식 (부산가톨릭대학교 보건과학대학 방사선학과) ;
  • 조용인 (동남권원자력의학원 영상의학과) ;
  • 김정훈 (부산가톨릭대학교 보건과학대학 방사선학과)
  • Received : 2017.02.22
  • Accepted : 2017.03.15
  • Published : 2017.03.31

Abstract

In the case of nuclear medicine practitioners in medical institutions, a wide range of exposure dose to individual workers can be found, depending on the type of source, the amount of radioactivity, and the use of shielding devices in handling radioactive isotopes. In this regard, this study evaluated the organ dose on practitioners as well as the dose reduction effect of the L-block shielding device in handling the diagnostic radiation source through the simulation based on the Monte Carlo method. As a result, the distribution of organ dose was found to be higher as the position of the radiation source was closer to the handling position of a practitioner, and the effective dose distribution was different according to the ICRP tissue weight. Furthermore, the dose reduction effect according to the L-block thickness tended to decrease, which showed the exponential distribution, as the shielding thickness increased. The dose reduction effect according to each radiation source showed a low shielding effect in proportion to the emitted gamma ray energy level.

의료기관 내 핵의학 종사자는 방사성동위원소 취급 시 사용하는 선원의 종류, 방사능량, 차폐기구의 사용 여부에 따라 종사자 개인별로 광범위한 피폭선량을 나타낼 수 있다. 이에 본 연구에서는 몬테카를로 기법을 기반으로 한 모의실험을 통해 진단용 방사선원 취급 시 종사자의 장기별 선량평가와 L-block 차폐기구 사용에 따른 선량감소효과를 분석하였다. 그 결과, 방사선원의 취급 위치에 근접할수록 높은 장기선량 분포를 나타내었고, ICRP 조직가중치에 따라 유효선량 분포가 상이한 양상을 보였다. 또한 L-block 두께에 따른 선량감소효과는 차폐두께 증가에 따라 지수함수 분포로 감소되는 경향을 나타내었으며, 방사선원별 선량감소효과는 방출하는 감마선 에너지에 비례하여 낮은 차폐효과를 보였다.

Keywords

References

  1. Chang-Seon Lim, Se-Heon Kim : A Study on the Radiation Dose Managements in the Nuclear Medicine Department, 10(7), 1760-1765, 2009 https://doi.org/10.5762/KAIS.2009.10.7.1760
  2. Nuclear Safety and Security Commission : 2014-69. Regulation on evaluation and management of personal exposure dose.
  3. Mattsson S., and M. Soderberg : Dose Quantities and Units for Radiation Protection. Springer Berlin Heidelberg, 7-18, 2013
  4. Yong-In Cho, Chang-Soo Kim, Se-Sik Kang, Jung-hoon Kim et al. : Shielding Analysis of the Material and Thickness of Syringe Shield on the Radionuclide, Journal of Korea Contents Association, 15(7), 282-288, 2015 https://doi.org/10.5392/JKCA.2015.15.07.282
  5. Jun chul Park, Sung jae Pyo : Study of External Radiation Expose Dose on Hands of Nuclear Medicine Workers, Journal of Korean Society of Radiological Technology, 35(2), 141-149, 2012
  6. Yeong Seon Kim, Myeong Deok Seo, Wan Kyu Lee et al. : The Usefulness Evaluation of Radiation Shielding Devices in PET Scan Procedures, Korea Society of Nuclear medicine Technology, 14(2), 65-76. 2010
  7. LANL : User's manual version 2.5.0. Los Alamos National Laboratory, LA-CP-05-0369, 2005
  8. Myung Chul Lee: Radioisotope nuclide information, Korean Association for Radiation Application, 2010
  9. International Commission on Radiological Protection : The 2007 recommendations of the International Commission on Radiological Protection. ICRP Publication 103, Ann. ICRP 37, 2007
  10. Yong-In Cho, Soo-Young Ye, Jung-Hoon Kim : Evaluation of the Apron Effectiveness during Handling Radiopharmaceuticals in PET/CT Work Environment, 38(3), 187-194, 2015 https://doi.org/10.17946/JRST.2015.38.3.01
  11. Carnicer, A., Ginjaume, M., Duch, M.A., et al. : The use of different types of thermoluminescent dosimeters to measure extremity doses in nuclear medicine, Radiation Measurements, 46(12), 1835-1838, 2011 https://doi.org/10.1016/j.radmeas.2011.06.047
  12. Blunck Ch., Becker F., Urban M., : Simulation of Beta Radiator Handling Procedures in Nuclear Medicine by Means of a Movable Hand Phantom, Radiation Protection Dosimetry, 144(1-4), 497-500, 2011 https://doi.org/10.1093/rpd/ncq329
  13. International Communication on Radiological Protection, Statement on Tissue Reactions, June 2011