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광자극형광나노닷선량계를 사용한 X선 빔의 유효에너지 결정

Determination of the Effective Energy of X-Ray Beam Using Optically Stimulated Luminescent nanoDot Dosimeters

  • 김종언 (가야대학교 방사선학과) ;
  • 이상훈 (가야대학교 방사선학과)
  • Kim, Jongeon (Department of Radiological Science, Kaya University) ;
  • Lee, Sanghun (Department of Radiological Science, Kaya University)
  • 투고 : 2015.08.24
  • 심사 : 2015.10.25
  • 발행 : 2015.10.30

초록

이 연구의 목적은 다종에너지 X선 빔의 유효에너지를 결정하는데 있다. 80 kVp X선 빔에 대한 알루미늄의 반가층은 광자극형광나노닷선량계들(OSLnDs)을 사용하여 측정하였다. 선감쇠계수(${\mu}$)는 측정된 반가층을 사용하여 계산하였다. 그리고 질량감쇠계수(${\mu}/{\rho}$)는 알루미늄의 밀도로 선감쇠계수를 나누어 얻었다. 얻어진 질량감쇠계수의 유효에너지($E_{eff}$)는 미국표준기술연구소(NIST)에서 주어진 알루미늄의 광자에너지들에 대한 X선질량감쇠계수들의 자료를 사용하여 결정하였다. 결과로서, 반가층, 선감쇠계수 및 질량감쇠계수는 각각 2.262 mmAl, $3.06cm^{-1}$, $1.114cm^2/g$이다. 그리고 유효에너지는 29.79 keV에서 결정되었다.

The purpose of this study is to determine the effective energy of a polyenegetic X-ray beam. The half value layer(HVL) of aluminum for 80 kVp X-ray beam was measured by using optically stimulated luminescent nanoDot dosimeters(OSLnDs). The linear attenuation coefficient(${\mu}$) was calculated using the measured HVL. And the mass attenuation coefficient(${\mu}/{\rho}$) was obtained by dividing the linear attenuation coefficient by the density(${\rho}$) of aluminum. The effective energy($E_{eff}$) of the obtained mass attenuation coefficient was determined using data of the X-ray mass attenuation coefficients for photon energies of aluminum given by National Institute of Standards and Technology(NIST). As a result, the HVL value is 2.262 mmAl. The ${\mu}$ value is $3.06cm^{-1}$. The ${\mu}/{\rho}$ value is $1.114cm^2/g$. And the $E_{eff}$ value was determined at 29.79 keV.

키워드

참고문헌

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피인용 문헌

  1. CT 모의치료장치에서 발생된 X-선 빔의 유효에너지 계산식 유도 vol.15, pp.6, 2021, https://doi.org/10.7742/jksr.2021.15.6.869