Journal of the Korean Society of Radiology (대한영상의학회지)

The Korean Society of Radiology (대한영상의학회)
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Diagnostic Reference Level of Patient Dose during a Plain Chest Radiography Examination in Korea

우리나라의 흉부엑스선검사에서의 환자선량 권고량

  • Chung, Myung-Jin (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Lee, Kwang-Yong (Pharmaceuticals and Medical Devices Research Department, Radiation Safety Division, National Institute of Food and Drug Safety Evaluation) ;
  • Lee, Byung-Young (Pharmaceuticals and Medical Devices Research Department, Radiation Safety Division, National Institute of Food and Drug Safety Evaluation) ;
  • Kim, Hyeog-Ju (Pharmaceuticals and Medical Devices Research Department, Radiation Safety Division, National Institute of Food and Drug Safety Evaluation) ;
  • Lim, Hyo-Keun (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • 정명진 (성균관대학교 의과대학 삼성서울병원 영상의학과) ;
  • 이광용 (식품의약품안전평가원 의료제품연구부 방사선안전과) ;
  • 이병영 (식품의약품안전평가원 의료제품연구부 방사선안전과) ;
  • 김혁주 (식품의약품안전평가원 의료제품연구부 방사선안전과) ;
  • 임효근 (성균관대학교 의과대학 삼성서울병원 영상의학과)
  • Received : 2009.11.06
  • Accepted : 2010.01.28
  • Published : 2010.06.01
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Abstract

Purpose: To establish recommendation criteria for the determination of patient dose for a plain chest radiography examination (PCR) by surveying the examination protocols for the performance of PCR, determining patient doses, and analyzing the relationship between these protocols and patient dose. Materials and Methods: We surveyed the examination protocols for the PCR of 95 radiography units in 82 institutes. We measured the patient dose as the surface entrance dose (SED) in these unites using an anthropomorphic phantom. We ultimately compared the results of the survey against several significant criteria. Results: The protocol for performing a PCR in Korea was $111{\pm}17$ kVp and $7.0{\pm}6.7$ mAs. The mean and median SED were $0.30{\pm}0.27$ mGy and 0.22 mGy, respectively. The third quartile value was 0.34 mGy, while the variability between the types of institutes and the average values of SED were $0.27{\pm}0.17$ mGy, $0.28{\pm}0.29$ mGy, and $0.34{\pm}0.31$ mGy for primary, secondary, and tertiary hospitals, respectively. The types of units include the average values of SED, which were $0.18{\pm}0.11$ mGy, $0.37{\pm}0.28$ mGy, and $0.32{\pm}0.31$ mGy for film/screen, CT, and digital radiography systems, respectively. Conclusion: The average patient dose during PCR in Korea was 0.30 mGy/exam. In perspective, the diagnostic reference level of patient dose for postero-anterior chest radiography was 0.34 mGy/exam.

목적: 환자방어의 최적화를 위하여 우리나라의 흉부엑스선검사 시 환자선량 실태를 측정하고 이로부터 환자선량 권고 수치를 확립하고자 하였다. 대상과 방법: 국내 각급 의료기관 82개소의 95개 흉부 엑스선 촬영장치를 대상으로 흉부엑스선 검사 시 촬영조건 및 진단영상정보를 수집하고 기관 표준 검사 조건을 원용한 검사법으로 인형 팬텀에 대한 입사선량을 측정하였다. 입사선량 중 상향 3/4 순위에 해당하는 선량을 환자 피폭 선량 진단참고준위 권고 수치로 설정하였다. 결과: 대상 기관들이 흉부엑스선검사 시 사용하는 검사조건은 관전압 평균 $111{\pm}17$ kVp, 관전류량 $7.0{\pm}6.7$ mAs이었다. 해당 장비들로부터 흉부엑스선검사 시 환자가 받는 피폭선량은 입사선량 기준으로 평균 $0.30{\pm}0.27$ mGy이었으며 제1사분위수 0.13 mGy, 제2사분위수 0.22 mGy 제3사분위수 0.34 mGy이었다. 의료기관 규모별 분류 시 1차 의료기관 평균 $0.27{\pm}0.17$ mGy, 2차 의료기관 $0.28{\pm}0.29$ mGy, 3차 의료기관 $0.34{\pm}0.31$ mGy이었으며, 장비 종류별 분류 시 필름-스크린 시스템 $0.18{\pm}0.11$ mGy, CT $0.37{\pm}0.28$ mGy, digital radiography $0.32{\pm}0.31$ mGy이었다. 결론: 우리나라 의료기관의 흉부엑스선검사 시 평균 환자선량은 후전면 촬영 1회당 0.30 mGy이며, 후전면 흉부엑스선검사 시 의료기관에 권고할 수 있는 환자 피폭선량 진단 참고준위 수치는 0.34 mGy이었다.

Keywords

Acknowledgement

Supported by : 식품의약품안전청, (재)인성의과학연구재단

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