Earticle

초록

영어

Background: This study investigated the characteristics of optically stimulated luminescence dosimeters (OSLDs) with fully filled deep electron/hole traps in the kV energy ranges. Materials and Methods: The experimental group consisted of InLight nanoDots, whose deep electron/hole traps were fully filled with 5 kGy pre-irradiation (OSLDexp), whereas the non-preirradiated OSLDs were arranged as a control group (OSLDcont). Absorbed doses for 75, 80, 85, 90, 95, 100, and 105 kVp with 200 mA and 40 ms were measured and defined as the unit doses for each energy value. A bleaching device equipped with a 520-nm long-pass filter was used, and the strong beam mode was used to read out signal counts. The characteristics were investigated in terms of fading, dose sensitivities according to the accumulated doses, and dose linearity. Results and Discussion: In OSLDexp, the average normalized counts (sensitivities) were 12.7%, 14.0%, 15.0%, 10.2%, 18.0%, 17.9%, and 17.3% higher compared with those in OSLDcont for 75, 80, 90, 95, 100, and 105 kVp, respectively. The dose accumulation and bleaching time did not significantly alter the sensitivity, regardless of the filling of deep traps for all radiation qualities. Both OSLDexp and OSLDcont exhibited good linearity, by showing coefficients determination (R2) > 0.99. The OSL sensitivities can be increased by filling of deep electron/hole traps in the energy ranges between 75 and 105 kVp, and they exhibited no significant variations according to the bleaching time.

목차

ABSTRACT
Introduction
Materials and Methods
1. Half-Value Layer (HVL) Measurement and Reference Dosimetry
2. Optically Stimulated Luminescence (OSL) Dosimetry System
3. Experimental Setup
Results and Discussion
1. Absolute Dosimetry
2. First Time Bleaching for OSLDexp
3. Determination of the Optimal Bleaching Time
4. Fading Effect
5. Dose Sensitivity
6. Dose Linearity
Conclusion
Conflict of Interest
Acknowledgements
Author Contribution
References

키워드

저자

• Minsoo Chun [ Department of Radiation Oncology, Chung-Ang University Gwang Myeong Hospital, Gyeonggi-do, Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea ]
• Hyeongmin Jin [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; 4Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea ]
• Sung Young Lee [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea ]
• Ohyun Kwon [ Department of Medical Physics, University of Wisconsin, Madison, WI, USA ]
• Chang Heon Choi [ Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea; Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea ]
• Jong Min Park [ Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea; Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Korea ]
• Jung-in Kim [ Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea; Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea ] Corresponding Author

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