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KMID : 1151820210150010079
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Journal of the Korean Society of Radiology
2021 Volume.15 No. 1 p.79 ~ p.83
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Evaluation of Lead Oxide Dosimeter for Quality Assurance of Electron Beam in Radiotherapy
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Yang Seung-Woo
Han Moo-Jae
Park Sung-Kwang
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Abstract
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In radiation therapy, electron beam is often used in the treatment of superficial lesion. Accurate measurements are required because electron beam interacts with them in the beam path and affects dose measurements. However, no research has been conducted on electron beam quality assurance. in this study, PbO-based dosimeter was fabricated as a basic study for electron beam quality assurance. Thus, the reproducibility and linearity of the energy of 6, 9, and 12 MeV were analyzed to evaluate measurement accuracy and precision. Reproducibility measurements show RSD value of 1.024%, 1.019% and 0.890%, respectively, at 6, 9, and 12 MeV. linearity measurements show 0.9999 R2 at 6, 9, and 12 MeV altogether. Both evaluations show that the PbO dosimeter has very good measurement accuracy and precision with excellent results.
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KEYWORD
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Radiotherapy , Electron beam , Quality assurance , dosimeter , PbO
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