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Assessment of Counting Efficiency of a Whole Body Counter by Human Body Size and Standing Position Using Monte Carlo Method

몬테카를로 방법론을 이용한 측정 대상의 인체 크기와 측정 위치에 따른 전신계수기 계수효율 평가

  • Received : 2013.12.02
  • Accepted : 2014.01.29
  • Published : 2014.03.31

Abstract

For the case of radiation emergency, it is required to assess internal contamination of the public, including children as well as adults. The objective of the present study was to assess counting efficiency of a whole body counter by human body size and standing position of the measurement person. In this study, the FASTSCAN whole body counter used at National Radiation Emergency Medical Center of Korean Institute of Radiological and Medical Science was simulated by a radiation transport computer code. The simulation results of the counting efficiencies agreed well with measurements within the 2% of discrepancy for 4-year child and 5% for adults. The standing positions of the people were adjusted by body size to find the consistent trend of the counting efficiencies by human body size. Body size scaling factors of the whole body counter were derived to consider human body size and improve the measurement accuracy. The counting efficiency assessment methodology in this study can be successively used to improve the measurement accuracy when using a whole body counter for the case of radiation emergency.

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