Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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A Study on the Performance Evaluation of Portable Radiation Shielding Apparatus

이동형 방사선 차폐장치의 성능평가에 관한 연구

  • Received : 2018.07.09
  • Accepted : 2018.08.23
  • Published : 2018.08.31
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Abstract

When using a mobile X-ray unit, primary radiation creates medical images and secondary radiation scatters in many directions, which reduces image quality and causes exposure to patients, care givers and medical personnel. The purpose of this study was to develop a radiation shielding system for effectively shielding secondary radiation and evaluate its effectiveness. Using a mobile X-ray unit, spatial dose according to presence of human equivalent phantom and spatial dose using the developed shielding device were measured, and the phantom at 80 cm equidistance from center of X-ray was compared with spatial dose according to use of a shield. Measurements were taken at intervals of 10 cm every $30^{\circ}$ from the head direction($-90^{\circ}$) to the body direction($+90^{\circ}$). In the spatial dose measurement with and without the phantom, when the human equivalent Phantom was used, the spatial dose was increased by 40% in all directions from 40 cm to 100 cm from the central X-ray, and about 88% of the space dose was reduced when using the developed shields with the phantom. The equidistance dose at 80 cm from the central X-ray was increased by 39% from $5.1{\pm}0.26{\mu}Gy$ to $7.1{\pm}0.15{\mu}Gy$ when the human equivalent phantom was used, and when phantom was used and shielding was used, the spatial dose was reduced by about 90% from $7.1{\pm}0.15{\mu}Gy$ to $0.7{\pm}0.07{\mu}Gy$. The spatial dose of natural radiation was measured to be about $0.2{\pm}0.04{\mu}Gy$ when using the developed shielding with Phantom at a distance of 1 m or more. It is expected that by using the developed shielding system, it will be possible to effectively reduce secondary radiation dose received in all directions and to ensure safe imaging.

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References

  1. NCRP. Ionizing radiation exposure of the population of United States. Bethesda, MD: NCRP Report 160;2009.
  2. Gil JW. Estimated effective dose from diagnostic medical radiation in korean and factors that affect the high-level dose [dissertation]. Cheongju: Chungbuk National University; 2015.
  3. Korea Food & Drug Administration. A study on investigation and analysis of medical radiation usage [Internet]. National Digital Science Library; 2010 [cited 2018 May 30]. Available from:http://www.ndsl.kr/ndsl/search/detail/report/reportSearchResultDetail.do?cn=TRKO201100007732.
  4. ICRP. Avoidance of radiation injuries from medical interventional procedures. ICRP publication 85. Ann ICRP. 2000;30(2).
  5. ICRP. The 2007 Recommendations of the International Commission on Radiological Protection. ICRP publication 103. Ann ICRP. 2007;37(2-4).
  6. Grazer RE, Meislin HW, Westerman BR, Criss EA. Exposure to ionizing radiation in the emergency department from commonly performed portable radiographs. Ann Emerg Med 1987;16(4):17-20.
  7. Ciraulo DL, Marini CP, Lloyd GT, Fisher J. Do surgical residents, emergency medicine physicians, and nurses experience significant radiation exposure during the resuscitation of trauma patients?. Journal of Trauma and Acute Care Surgery. 1994;36(5);703-5. https://doi.org/10.1097/00005373-199405000-00018
  8. Jeong JH, Lim YS, Park KN, Kim YM, Choi SM, Lee MJ, et al. Radiation exposure to physicians in the emergency department. Korean Society of Emergency Medicine. 2008;19(1):25-30.
  9. Ministry of Health and Welfare. Rules for safety management of diagnostic radiation generators. Sejong: Ministry of Health and Welfare No.528;2010.
  10. Calton RR, Adler AM. Principles of radiographic image: An Art and a science. 3rd ed. Delmar, CA: Delmar Thomson Learning; 2001.267-70.
  11. Na SK, Han SH. A study on the factors of spatial scattered ray occurrence in the X-ray radiography room. Journal of Radiological Science and Technology. 2009;32(4).393-9.
  12. Back CH. A study of scattered radiation effect on digital radiography imaging system. Journal of Radiological Science and Technology. 2017;40(1). 71-8. https://doi.org/10.17946/JRST.2017.40.1.11
  13. Korea Food & Drug Administration. Electronic medical device specification. Korea Food & Drug Administration Notice 2007-83;2007.
  14. McCaffrey JP, Shen H, Downton B, Mainegra-Hing E. Radiation attenuation by lead and nonlead materials used in radiation shielding garments. Medical Physics. 2007;34(2):530-743. https://doi.org/10.1118/1.2426404
  15. Koo BY. Portable radiation shielding apparatus. patent application No. 10-2018-0005135[Internet]. Korea Intellectual Property Office. 2018.
  16. Hong SS, Kim DY. Measurement of Skin Dose Distribution for the Mobile X-ray Unit Collimator Shielding Device. Journal of the Korean Society for Digital Imaging in Medicine. 2010;12(1):5-8.
  17. Choe DY, Ko SJ, Kang SS, Kim CS, Kim JH, Kim, DH, et al. Analysis of dose reduction of surrounding patients in Portable X-ray. Journal of the Korean Society of Radiology. 2013;7(2): 113-20. https://doi.org/10.7742/jksr.2013.7.2.113
  18. Ministry of Health and Welfare. Medical law enforcement regulations. Ministry of Health and Welfare No 511; 2017.
  19. Park CH. Analysis of Space Radiation Dose Rate using Portable X-ray Generating Device for Abdomen. Journal of the Korean Society for Digital Imaging in Medicine. 2010;12(2):97-101.
  20. U.S. Department of Health and Human services. Guidelines for protecting the safety and health care workers. Washington DC: U.S. government printing office; 1998.
  21. Korea Atomic Energy Research Institute. Radiation dose rate[Internet], KAERI; 2018 [cited 2018 Jul 19] Available from:https://www.kaeri.re.kr/sub/sub03/sub03_02_01.jsp