Development of novel real-time radiation systems using 4-channel sensors

Yohei Inaba, Masaaki Nakamura, Masayuki Zuguchi, Koichi Chida

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Radiation-related tissue injuries after medical radiation procedures, such as fluoroscopically guided intervention (FGI), have been reported in patients. Real-time monitoring of medical radiation exposure administered to patients during FGI is important to avoid such tissue injuries. In our previous study, we reported a novel (prototype) real-time radiation system for FGI. However, the prototype sensor indicated low sensitivity to radiation exposure from the side and back, although it had high-quality fundamental characteristics. Therefore, we developed a novel 4-channel sensor with modified shape and size than the previous sensor, and evaluated the basic performance (i.e., measured the energy, dose linearity, dose rate, and angular dependence) of the novel and previous sensors. Both sensors of our real-time dosimeter system demonstrated the low energy dependence, excellent dose linearity (R2 = 1.0000), and good dose rate dependence (i.e., within 5% statistical difference). Besides, the sensitivity of 0 ± 180 in the horizontal and vertical directions was almost 100% sensitivity for the new sensor, which significantly improved the angular dependence. Moreover, the novel dosimeter exerted less influence on X-ray images (fluoroscopy) than other sensors because of modifying a small shape and size. Therefore, the developed dosimeter system is expected to be useful for measuring the exposure of patients to radiation doses during FGI procedures.

Original languageEnglish
Article number2741
Issue number9
Publication statusPublished - 2020 May 1


  • Developed dosimeter system
  • Disaster medicine
  • Fluoroscopically guided intervention
  • Medical radiation dose
  • Multi-channel sensor
  • Radiation skin injuries
  • Real-time radiation sensor


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