Characterization of Small Volume Plastic Scintillation Detector

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  • Fukui Yusuke
    Radiology Service, Shiga University of Medical Science Hospital
  • Hamada Yuto
    Radiology Service, Shiga University of Medical Science Hospital (Current address: Canon Medical Systems Corporation)
  • Noma Kazuo
    Radiology Service, Shiga University of Medical Science Hospital
  • Harada Naoki
    Radiology Service, Shiga University of Medical Science Hospital

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Other Title
  • 小体積シンチレーション検出器の特性について
  • 臨床技術 小体積シンチレーション検出器の特性について
  • リンショウ ギジュツ ショウタイセキ シンチレーション ケンシュツキ ノ トクセイ ニ ツイテ

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Abstract

<p>Some radiation detectors are used for quality assurance and measured to radiation dose for high precision external beam radiotherapy. Recently, plastic scintillation detectors for MeV X-ray measurement are commercially released. The purpose of this study was to evaluate the performance of a commercial plastic scintillation detector with respect to the dose linearity, dose rate dependence, and the output coefficient compared the ionization chamber and the semiconductor detector using each different X-ray energy with or without flattening filter. The result that the dose linearity of each detector showed a linear response in any detectors. Dose rate dependence of plastic scintillation detector was increased when setting dose rate was changed, especially setting to low dose rate. The output coefficient of plastic scintillation detector was equivalent as that of the semiconductor detector even in smallest irradiation field. In conclusion, it was suggested that the plastic scintillation detector is a suitable detector in dose verification measurements for high precision external beam radiotherapy, although we must be with care to low dose rate measurements.</p>

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