Evaluation of basic characteristics of a semiconductor detector for personal radiation dose monitoring

Kento Terasaki, Toshioh Fujibuchi, Hiroo Murazaki, Taku Kuramoto, Yoshiyuki Umezu, Yang Ishigaki, Yoshinori Matsumoto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Real-time radiation dose management is important because staff members working in interventional radiology may be exposed to relatively high doses of primary and scattered radiation from the body of a patient. In this study, we investigated the dependence of energy and dose rate of the commercially available semiconductor detector named Pocket Geiger (POKEGA) for personal monitoring in diagnostic X-rays. In the energy-dependence study, a suitable metal filter and the threshold level were examined for energy compensation using a Monte Carlo calculation code. Moreover, the energy dependence of the POKEGA with an optimal metal filter was compared with that of commercially available active personal dosimeters (APDs). With an aluminum filter, the difference of the ratio of the absorbed dose of silicon to that of air was ±7% for a tube voltage of 70–110 kV and a cutoff energy of 23 keV in the calculation. The energy response of the APDs, except the PDM-122B-SHC and the POKEGA, met the required JIS standard from 50 to 110 kV. In the dose rate-dependence study, a high linearity was observed up to 2.2 mGy h−1 using the POKEGA with an aluminum filter.

Original languageEnglish
Pages (from-to)189-194
Number of pages6
JournalRadiological Physics and Technology
Issue number2
Publication statusPublished - 2017 Jun 1


  • Energy compensation filter
  • Interventional radiology
  • Monte Carlo calculation
  • Personal monitoring
  • Semiconductor detector

ASJC Scopus subject areas

  • Radiation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Radiology Nuclear Medicine and imaging


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