Earticle

초록

영어

Background: The effects of radiation on the health of radiation workers who are constantly susceptible to occupational exposure must be assessed based on an accurate and reliable reconstruction of organ-absorbed doses that can be calculated using personal dosimeter readings measured as Hp(10) and dose conversion coefficients. However, the data used in the dose reconstruction contain significant biases arising from the lack of reality and could result in an inaccurate measure of organ-absorbed doses. Therefore, this study quantified the biases involved in organ dose reconstruction and calculated the bias-corrected Hp(10)-to-organ-absorbed dose coefficients for the use in epidemiological studies of Korean radiation workers. Materials and Methods: Two major biases were considered: (a) the bias in Hp(10) arising from the difference between the dosimeter calibration geometry and the actual exposure geometry, and (b) the bias in air kerma-to-Hp(10) conversion coefficients resulting from geometric differences between the human body and slab phantom. The biases were quantified by implementing personal dosimeters on the slab and human phantoms coupled with a Monte Carlo method and considered to calculate the bias-corrected Hp(10)-to-organ-absorbed dose conversion coefficients. Results and Discussion: The bias in Hp(10) was significant for large incident angles and low energies (e.g. , 0.32 for right lateral at 218 keV), whereas the bias in dose coefficients was significant for the posteroanterior (PA) geometry only (e.g. , 0.79 at 218 keV). The bias-corrected Hp(10)-to-organ-absorbed dose conversion coefficients derived in this study were up to 3.09- fold greater than those from the International Commission on Radiological Protection publications without considering the biases. Conclusion: The obtained results will aid future studies in assessing the health effects of occupational exposure of Korean radiation workers. The bias-corrected dose coefficients of this study can be used to calculate organ doses for Korean radiation workers based on personal dose records.

목차

ABSTRACT
Introduction
Materials and Methods
1. Background of Organ-Absorbed Dose Reconstruction
2. Bias in Organ Dose Reconstruction
3. Monte Carlo Simulation for Bias Estimation
4. Calculation of Bias-Corrected Hp(10)-to-Organ-Absorbed Dose Conversion Coefficients
Results and Discussion
1. Simulation Verification
2. Quantified Biases
3. Hp(10)-to-Organ-Absorbed Dose Conversion Coefficients
Conclusion
Conflict of Interest
Acknowledgements
Author Contribution
References

키워드

저자

• Areum Jeong [ Department of Radiation Emergency Medicine, Korea Institute of Radiological and Medical Sciences, Seoul, Korea ]
• Tae-Eun Kwon [ Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institute of Health, Rockville, MD, USA ] Corresponding Author
• Wonho Lee [ College of Health and Environmental Science, Korea University, Seoul, Korea ]
• Sunhoo Park [ Department of Radiation Emergency Medicine, Korea Institute of Radiological and Medical Sciences, Seoul, Korea ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629