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http://dx.doi.org/10.7742/jksr.2022.16.5.513

Evaluation of Detection Performance of TlBr Materials for the Development of Electron Beam Quality Assurance Dosimeters  

Yang, Seung-Woo (Department of Radiation Oncology, Collage of Medicine, Inje University)
Park, Sung-Kwang (Department of Radiation Oncology, Busan Paik Hospital, Inje University)
Publication Information
Journal of the Korean Society of Radiology / v.16, no.5, 2022 , pp. 513-518 More about this Journal
Abstract
Electron beam quality assurance (QA) should be done regularly for accurate radiation therapy. However, QA tools used in clinical practice are designed mainly for X-rays. So, a dosimeter for electron beam QA is required. Therefore, in this study, the electron beam detection performance was measured by using a thorium bromide material as an electron beam sensor. In addition, it was evaluated whether it could be applied with an electron beam QA dosimeter. Reproducibility, linearity, and dose rate dependence were evaluated at 6 MeV and 9 MeV energies. As a result of reproducibility, it showed a maximum output change of 0.92% at 6 MeV and 1.15% at 9 MeV. The linearity result evaluation and determination coefficient were presented as 0.9998. As a result of dose rate dependence evaluation, relative standard deviation 0.51% at 6 MeV and relative standard deviation 1.07% at 9 MeV were presented. The manufactured TlBr sensor shows the ability to detect radiation that meets the criteria for evaluation of reproducibility, linearity, and dose rate dependence. These results mean that the TlBr dosimeter is applicable as an electron beam QA dosimeter.
Keywords
Radiation Therapy; Dosimeter; Quality Assurance; Electron Beam; Thallium(I) Bromide;
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