Shielding Effect according to the Direction of Control Room Door Opening during Radiography

방사선촬영 중 제어실 문의 열린 방향에 따른 차폐효과

  • Choi, Weon-Keun (Department of Radiology, Asan Medical Center) ;
  • Kim, Jung-Hoon (Department of Radiological Science, Catholic University of Pusan) ;
  • Kang, Bo-Sun (Department of Radiological Science, Konyang University) ;
  • Bae, Seok-Hwan (Department of Radiological Science, Konyang University) ;
  • Lim, Chang-Seon (Department of Radiological Science, Konyang University)
  • 최원근 (서울아산병원영상의학팀) ;
  • 김정훈 (부산가톨릭대학교 방사선학과) ;
  • 강보선 (건양대학교 방사선학과) ;
  • 배석환 (건양대학교 방사선학과) ;
  • 임창선 (건양대학교 방사선학과)
  • Received : 2010.07.14
  • Accepted : 2010.09.08
  • Published : 2010.09.30


It is recommended that the door of control room is closed during radiography to protect a radiologic technologist. However, for those patients such as of emergency or pediatrics, the door must be kept open unavoidably to apply immediate medical administration and treatment on the potential case of emergency which could be happened through the course of radiography. In addition, it could be efficient by reducing patients waiting time when the door is open for a general case. This study was conducted to evaluate practical exposure rate to a radiologic technologist when the door is open during the radiography, and to find out the ways to minimize radiation exposure and to increase the efficiency simultaneously. Measuring practical exposure rate was fulfilled with glass dosimeter, and it was 2.02 mGy/week at the location of radiologic technologist under the condition that the door is open during the radiography, which was about 2.3 times higher than the 100 mR/week. It means that the considerable amount of scattered rays through the door opening, and increase exposure rate at the radiologic technologist. Hence we confirmed that a radiologic technologist probably overexposed if the door is open during the radiography. It was also confirmed by the Monte Carlo simulation that the exposure rate could be reduced up to approximately 1/100 by change only the door opening direction. In conclusion, since the proper door opening direction provides same shielding effect whether it is open or close, the door opening direction need to be considered when it is installed at radiography facilities.


Scattered rays;Shielding effect;Door opening direction


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