Reconstruction of Radiation Dose Received by Diagnostic Radiologic Technologists in Korea
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참고문헌
키워드
초록
Objectives: Diagnostic medical radiation workers in Korea have been officially monitored for their occupational radiation doses since 1996. The purpose of this study was to design models for reconstructing unknown individual radiation doses to which diagnostic radiation technologists were exposed before 1996. Methods: Radiation dose reconstruction models were developed by using cross-sectional survey data and the personal badge doses of 8167 radiologic technologists. The models included calendar year and age as predictors, and the participants were grouped into six categories according to their sex and facility type. The annual doses between 1971 and 1995 for those who were employed before 1996 were estimated using these models. Results: The calendar year and age were inversely related to the estimated radiation doses in the models of all six groups. The annual median estimated doses decreased from 9.45 mSv in 1971 to 1.26 mSv in 1995, and the associated dose variation also decreased with time. The estimated median badge doses from 1996 (1.22 mSv) to 2011 (0.30 mSv) were similar to the measured doses (1.68 mSv to 0.21 mSv) for the same years. Similar results were observed for all six groups. Conclusions: The reconstruction models developed in this study may be useful for estimating historical occupational radiation doses received by medical radiologic technologists in Korea.
Abstract
Objectives: Diagnostic medical radiation workers in Korea have been officially monitored for their occupational radiation doses since 1996. The purpose of this study was to design models for reconstructing unknown individual radiation doses to which diagnostic radiation technologists were exposed before 1996. Methods: Radiation dose reconstruction models were developed by using cross-sectional survey data and the personal badge doses of 8167 radiologic technologists. The models included calendar year and age as predictors, and the participants were grouped into six categories according to their sex and facility type. The annual doses between 1971 and 1995 for those who were employed before 1996 were estimated using these models. Results: The calendar year and age were inversely related to the estimated radiation doses in the models of all six groups. The annual median estimated doses decreased from 9.45 mSv in 1971 to 1.26 mSv in 1995, and the associated dose variation also decreased with time. The estimated median badge doses from 1996 (1.22 mSv) to 2011 (0.30 mSv) were similar to the measured doses (1.68 mSv to 0.21 mSv) for the same years. Similar results were observed for all six groups. Conclusions: The reconstruction models developed in this study may be useful for estimating historical occupational radiation doses received by medical radiologic technologists in Korea.
참고문헌 (15)
- "NCRP report no. 163: radiation dose reconstruction: principles and practices"[URL]
- Boice JD, "A comprehensive dose reconstruction methodology for former rocketdyne", atomics international radiation workers, 2006, pp.90(5), 409~430
- Bouville A, "Dose reconstruction for the million worker study: status and guidelines", Health Phys, 108(2), pp.206~220 (2015)
- Eheman CR, "Estimating occupational radiation doses when individual dosimetry information is not available: a job exposure matrix", Am J Ind Med, 36(3), pp.348~359 (1999)
- Yoshinaga S, "Results and problems of occupational dose reconstruction for Japanese radiological technologists", Radiat Prot Dosimetry, 77(1-2), pp.73~78 (1998)
- Simon SL, "Estimating historical radiation doses to a cohort of U.S. radiologic technologists", Radiat Res, 166(1 Pt 2), pp.174~192 (2006)
- Simon SL, "Radiation organ doses received in a nationwide cohort of U.S. radiologic technologists: methods and findings", Radiat Res, 182(5), pp.507~528 (2014)
- Zhang L, "A retrospective dosimetry method for occupational dose for chinese medical diagnostic X-ray workers", Radiat Prot Dosimetry, 77(1-2), pp.69~72 (1998)
- Lee WJ, "The radiologic technologists’ health study in South Korea: study design and baseline results", Int Arch Occup Environ Health, 88(6), pp.759~768 (2015)
- Lee WJ, "Occupational radiation doses among diagnostic radiation workers in South Korea, 1996–2006", Radiat Prot Dosimetry, 136(1), pp.50~55 (2009)
- "Medical Service Act" (1994)[URL]
- Kim SH, "An empirical study on the earnings & labor mobility performances of qualified practitioners", pp.2010
- Toohey RE, "Scientific issues in radiation dose reconstruction", Health Phys, 95(1), pp.26~35 (2008)
- Armstrong BG, "Effect of measurement error on epidemiological studies of environmental and occupational exposures", Occup Environ Med, 55(10), pp.651~656 (1998)
- Heid IM, "Two dimensions of measurement error: classical and Berkson error in residential radon exposure assessment", J Expo Anal Environ Epidemiol, 14(5), pp.365~377 (2004)