Radiological Physics and Technology

, Volume 4, Issue 2, pp 189–193

Comparison of dose at an interventional reference point between the displayed estimated value and measured value

  • Koichi Chida
  • Yohei Inaba
  • Yoshiaki Morishima
  • Masaaki Taura
  • Ayako Ebata
  • Isao Yanagawa
  • Ken Takeda
  • Masayuki Zuguchi
Article

DOI: 10.1007/s12194-011-0121-6

Cite this article as:
Chida, K., Inaba, Y., Morishima, Y. et al. Radiol Phys Technol (2011) 4: 189. doi:10.1007/s12194-011-0121-6

Abstract

Today, interventional radiology (IR) X-ray units are required for display of doses at an interventional reference point (IRP) for the operator (IR physician). The dose displayed at the IRP (the reference dose) of an X-ray unit has been reported to be helpful for characterizing patient exposure in real time. However, no detailed report has evaluated the accuracy of the reference doses displayed on X-ray equipment. Thus, in this study, we compared the displayed reference dose to the actual measured value in many IR X-ray systems. Although the displayed reference doses of many IR X-ray systems agreed with the measured actual values within approximately 15%, the doses of a few IR units were not close. Furthermore, some X-ray units made in Japan displayed reference doses quite different from the actual measured value, probably because the reference point of these units differs from the International Electrotechnical Commission standard. Thus, IR physicians should pay attention to the location of the IRP of the displayed reference dose in Japan. Furthermore, physicians should be aware of the accuracy of the displayed reference dose of the X-ray system that they use for IR. Thus, regular checks of the displayed reference dose of the X-ray system are important.

Keywords

Interventional radiologyRadiation injuryExposure doseRadiation dosimetryInterventional reference point (IRP)Radiation safety

Copyright information

© Japanese Society of Radiological Technology and Japan Society of Medical Physics 2011

Authors and Affiliations

  • Koichi Chida
    • 1
  • Yohei Inaba
    • 2
  • Yoshiaki Morishima
    • 3
  • Masaaki Taura
    • 1
  • Ayako Ebata
    • 1
  • Isao Yanagawa
    • 2
  • Ken Takeda
    • 1
  • Masayuki Zuguchi
    • 1
  1. 1.Department of Radiological Technology, School of Health Sciences, Faculty of MedicineTohoku UniversitySendaiJapan
  2. 2.Department of RadiologyTohoku University HospitalSendaiJapan
  3. 3.Department of RadiologyTohoku Employees’ Pension Welfare HospitalSendaiJapan