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KMID : 1151820220160040405
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Journal of the Korean Society of Radiology
2022 Volume.16 No. 4 p.405 ~ p.410
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Development and Feasibility Evaluation of CsPbBr3 Dosimeter for Brachytherapy
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Yang Seung-Woo
Park Sung-Kwang
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Abstract
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In brachytherapy, a radiation source is inserted into the body to kill tumor tissue. Therefore, it is important to accurately measure the location of the source and the dose distribution. In this study, a dosimeter that can be used for brachytherapy was developed using CsPbBr3 which is cheaper than the existing detector materials and has a simpler manufacturing process. The CsPbBr3 dosimeter performance was evaluated by analyzing reproducibility, linearity, and distance dependence in 192Ir source. As a result of reproducibility evaluation, the RSD was 1.36%, which satisfies the standard value of 1.5%. As a result of the linearity evaluation, the R2 value was 0.9993, which satisfies the standard R2 of 0.9990. The distance dependence evaluation showed a signal value that decreased exponentially as the distance increased. The evaluation results show that the CsPbBr3 dosimeter satisfies the evaluation criteria and can be used as a brachytherapy quality assurance dosimeter.
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KEYWORD
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Brachytherapy, Dosimeter, Radiation, Perovskite, CsPbBr3
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