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Measuring Absorbed Dose from Medical X-ray Equipment Using Optically Stimulated Luminescence Dots

광자극선량계의 저에너지 엑스선 특성비교

  • Received : 2018.01.18
  • Accepted : 2018.02.28
  • Published : 2018.02.28

Abstract

In this paper, we measured and analyzed the dose correction factor, absorbed dose linearity, peak voltage X-ray response, angular dependence. Exposure dose correction factor, absorbed dose linearity, and peak voltage linearity using the medical X-ray generator were all in accordance with IEC-62387-1 (2007). The reference to the dosimetry direction at 0, 30, and 60 degrees relative to baseline radiation exposure was -29% (${\pm}30^{\circ}$) and + 67% (${\pm}60^{\circ}$). The values measured at $30^{\circ}$ were -8% lower than the standard and -18% lower than the standard at $60^{\circ}$. Therefore, the effect of direction should be corrected when using OSL dot dosimeter.

본 논문에서는 OSL 도트 선량계의 교정인자, 흡수선량 선형성, 피크전압 선형성, 각도 변화에 의한 흡수선량 변화를 측정하고 분석했다. 의료용 X 선발생 장치를 사용하여 조사에 노출 선량 보정 계수, 흡수선량 선형성, 피크 전압 선형성은 모두 IEC-62387-1 (2007) 기준을 만족하였다. 기준 방사선 노출과 관련하여 0도, 30도 및 60도에서 선량계 방향에 대한 기준은 -29 % (${\pm}30^{\circ}$) 및 + 67 % (${\pm}60^{\circ}$)이었다. 30도에서 측정된 값은 기준보다 -8 % 낮고 60도에서 기준보다 -18 % 낮게 나타났다. 그러므로 OSL 도트 선량계 사용 시 방향에 따른 영향을 보정하여야 한다.

Keywords

References

  1. L. Botter-Jensen, "Luminescence techniques: instrumentation and methods," Radiation Measurements, Vol. 27, No. 5, pp.749-768, 1997. https://doi.org/10.1016/S1350-4487(97)00206-0
  2. L. Boetter-Jensen, S.W.S. McKeever, A.G. Wintle, "Optically stimulated luminescence dosimetry," Elsevier publication. pp.1-374, 2003.
  3. International Electrotechnical Commission, "IEC- 62387-1 Radiation protection instrumentation - Passive integrating dosimetry systems for environmental and personal monitoring - Part 1: General characteristics and performance requirements," International Electrotechnical Commission, pp.1-142, 2007.
  4. S.Y. Lee, K.J. Lee, "Development of a personal dosimetry system based on optically stimulated luminescence of alpha-$Al_2O_3$:C for mixed radiation fields," Applied Radiation and Isotopes, Vol. 54, No. 4, pp.675-685, 2001. https://doi.org/10.1016/S0969-8043(00)00302-X
  5. Y. Musa, S. Hashim, , D.A. Bradley, M.K.A. Karim, A. Hashim, "Reproducibility assessment of commercial optically stimulated luminescence system in diagnostic X-ray beams," Journal of Radioanalytical and Nuclear Chemistry, Vol. 314, No. 3, pp.1-8, 2017. https://doi.org/10.1007/s10967-017-5353-4
  6. C.S. Lim, S.B. Lee, G.H. Jin, "Performance of optically stimulated luminescence $Al_2O_3$ dosimeter for low doses of diagnostic energy X-rays," Applied Radiation and Isotopes, Vol. 69, No. 10, pp. 1486-1489, 2011. https://doi.org/10.1016/j.apradiso.2011.06.001