Earticle

초록

영어

Background: The thermoluminescent dosimeter (TLD) and Monte Carlo (MC) dosimetry are carried out to determine the occupational dose for personnel in the handling of 125I seed sources. Materials and Methods: TLDs were placed in different layers of the Alderson-Rando phantom in the thyroid, lung and also eyes and skin surface. An 125I seed source was prepared and its activity was measured using a dose calibrator and was placed at two distances of 20 and 50 cm from the Alderson-Rando phantom. In addition, the Monte Carlo N-Particle Extended (MCNPX 2.6.0) code and a computational phantom with a lattice-based geometry were used for organ dose calculations. Results and Discussion: The comparison of TLD and MC results in the thyroid and lung is consistent. Although the relative difference of MC dosimetry to TLD for the eyes was between 4% and 13% and for the skin between 19% and 23%, because of the existence of a higher uncertainty regarding TLD positioning in the eye and skin, these inaccuracies can also be acceptable. The isodose distribution was calculated in the cross-section of the head phantom when the 125I seed was at two distances of 20 and 50 cm and it showed that the greatest dose reduction was observed for the eyes, skin, thyroid, and lungs, respectively. The results of MC dosimetry indicated that for near the head positions (distance of 20 cm) the absorbed dose rates for the eye lens, eye and skin were 78.1±2.3, 59.0±1.8, and 10.7±0.7 μGy/mCi/hr, respectively. Furthermore, we found that a 30 cm displacement for the 125I seed reduced the eye and skin doses by at least 3- and 2-fold, respectively. Conclusion: Using a computational phantom to monitor the dose to the sensitive organs (eye and skin) for personnel involved in the handling of 125I seed sources can be an accurate and inexpensive method.

목차

ABSTRACT
Introduction
Materials and Methods
1. Radioactive Source, Phantom, and Dosimeter Specifications
2. Experiment Design
3. Monte Carlo Simulation
Results and Discussion
Conclusion
Conflict of Interest
Acknowledgements
Ethical Statement
Author Contribution
References

키워드

저자

• Hosein Poorbaygi [ Applied Radiation Research School, Nuclear Science and Technology Research Institute, Tehran, Iran ] Corresponding Author
• Seyed Mostafa Salimi [ Departments of Physics, University of Arak-Sardasht Campus, Arak, Iran ]
• Falamarz Torkzadeh [ Applied Radiation Research School, Nuclear Science and Technology Research Institute, Tehran, Iran ]
• Saeid Hamidi [ Departments of Physics, University of Arak-Sardasht Campus, Arak, Iran ]
• Shahab Sheibani [ Applied Radiation Research School, Nuclear Science and Technology Research Institute, Tehran, Iran ]

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