Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Assessment of Maternal Organs and Fetal Doses in Pregnant Female Nuclear Medicine Practitioners Using the Monte Carlo Method

몬테카를로 방법을 이용한 임신한 여성 핵의학 종사자의 모체 장기 및 태아선량 평가

  • Cho, Yong-In (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
  • 조용인 (부산가톨릭대학교 보건과학대학 방사선학과)
  • Received : 2022.07.15
  • Accepted : 2022.08.11
  • Published : 2022.08.31
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Abstract

The purpose of this study was to evaluate maternal organ and fetal doses by week of pregnancy for pregnant women nuclear medicine practitioners in the nuclear medicine field. In addition, we intend to present basic data for the management of exposure doses of female nuclear medicine practitioners. In this study, phantoms of childbearing women, 3, 6, 9 months pregnant women were simulated using MCNPX(Monte Carlo N-Particle Extended) among the Monte Carlo methods. First, volume source was constructed based on 10 cm of the anterior part of the lower abdomen of the phantom, and the organ and fetal doses were evaluated for each week of the pregnant woman according to the type of radioactive isotope. Second, the organ and fetal dose of pregnant women were evaluated by increasing the distance between the source and the abdominal surface by 50 and 100 cm. As a result, 18F sources showed high organ and fetal doses in pregnant women 0 to 3 months, and the dose distribution gradually decreased in 6 to 9 months pregnant women. The distribution of organ and fetal doses for 99mTc and 123I sources showed the same tendency as that of 18F, and the overall absorbed dose distribution was relatively lower than that of 18F. Through this study, it is considered that workers in the early stages of pregnancy within 3 months will need appropriate management to minimize occupational exposure dose.

Keywords

Acknowledgement

This paper was supported by RESEARCH FUND offered from Catholic University of Pusan in 2022.

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