Radiological Physics and Technology

, Volume 11, Issue 4, pp 445–450 | Cite as

Effectiveness of a novel real-time dosimeter in interventional radiology: a comparison of new and old radiation sensors

  • Yohei InabaEmail author
  • Masaaki Nakamura
  • Koichi Chida
  • Masayuki Zuguchi


Radiation dose management is important in interventional radiology (IR) procedures, such as percutaneous coronary intervention, to prevent radiation-induced injuries. Therefore, radiation dose should be monitored in real time during IR. This study evaluated the fundamental characteristics of a novel real-time skin dosimeter (RTSD) developed at our institution. In addition, we compared the performance of our new and old radiation sensors and that of a skin dose monitor (SDM), with ion chamber reference values. We evaluated the fundamental characteristics (e.g., energy dependence, dose dependence, and angular dependence) of the RTSD developed by us in the diagnostic X-ray energy range. The performance of our RTSD was similar to that of the SDM. In particular, the new radiation sensor of our RTSD demonstrated better dose rate dependence compared to the old sensor. In addition, the new sensor had the advantage of being small in size and thus minimally affecting the X-ray images compared to the old sensor. Therefore, the developed skin dosimeter and radiation sensor may be useful in real-time measurement of patients’ exposure to and multi-channel monitoring of radiation in IR procedures. The new dosimeter system can be recommended for visualization and management of the radiation dose to which the patients’ skin is exposed.


Interventional radiology Radiation dose Radiation skin injuries Real-time skin dosimeter 



We thank Takafumi Honda and Fumitaka Sato of the Tohoku University for their invaluable assistance. This work was supported in part by a Grant-in-Aid for Scientific Research (17K10392) from the Japan Society for the Promotion of Science.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Research involving human participants

This article does not contain any studies with human participants performed.

Research involving animals

This article does not contain any studies with animals performed.


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Copyright information

© Japanese Society of Radiological Technology and Japan Society of Medical Physics 2018

Authors and Affiliations

  • Yohei Inaba
    • 1
    • 2
    Email author
  • Masaaki Nakamura
    • 1
  • Koichi Chida
    • 1
    • 2
  • Masayuki Zuguchi
    • 1
  1. 1.Department of Radiological Technology, Faculty of MedicineTohoku University School of Health SciencesSendaiJapan
  2. 2.Department of Radiation Disaster Medicine, International Research Institute of Disaster ScienceTohoku UniversitySendaiJapan

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