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KMID : 1151820200140010001
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Journal of the Korean Society of Radiology
2020 Volume.14 No. 1 p.1 ~ p.6
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Study on the Applicability of Semiconductor Compounds for Dose Measurement in Electron Beam Treatment
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Yang Seung-Woo
Han Moo-Jae
Shin Yo-Han
Jung Jae-Hoon
Choi Yun-Seon
Cho Heung-Lae
Park Sung-Kwang
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Abstract
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In this study, it was intended to replace the existing plane parallel ionization chamber, which requires cross-calibration in electron beam treatment. The semiconductor compounds HgI2 was fabricated as detector, and the characteristics of HgI2 detector for the 6, 9 and 12 MeV electron beam was analyzed in the linear accelerator. It was also intended to evaluate the possibility of substitution with existing detectors and their applicability as electron beam dosimetry and to use them as a basic study of the development of electronic beam dosimeter. As a result of reproducibility, RSD was 0.4246%, 0.5054%, and 0.8640% at 6, 9, and 12 MeV energy, respectively, indicating that the output signal was stable. As a result of the linearity, the R2 was 0.9999 at 6 MeV, 0.9996 at 9 MeV, and 0.9997 at 12 MeV showed that the output signal is proportional to HgI2 as the dose is increased. The HgI2 detector of this study is highly applicable to electron beam measurement, and it may be used as a basic research on electron beam detection.
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KEYWORD
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Radiation therapy, Electron, Detector, Semi-conductive compound, Mercury(II) Iodide
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