Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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A Study on Establishment of the Optimal Target Exposure Index for Skull Radiography Based on Diagnostic Reference Level

진단참고수준 기반 두부 방사선검사의 최적 목표노출지수 설정에 관한 연구

  • Park, Hye-Min (Department of Health and Safety Convergence Science, Korea University) ;
  • Yoon, Yong-Su (Department of Radiological Science, Dongseo University) ;
  • Kim, Eun-Hye (Department of Health and Safety Convergence Science, Korea University) ;
  • Jeong, Hoi-Woun (Department of Radiological Science, Baekseok Culture University) ;
  • Kim, Jung-Su (Department of Radiologic Technology, Daegu Health College)
  • 박혜민 (고려대학교 보건안전융합과학과) ;
  • 윤용수 (동서대학교 방사선학과) ;
  • 김은혜 (고려대학교 보건안전융합과학과) ;
  • 정회원 (백석문화대학교 방사선과) ;
  • 김정수 (대구보건대학교 방사선과)
  • Received : 2021.12.17
  • Accepted : 2021.12.28
  • Published : 2021.12.31
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Abstract

The International Electrotechnical Commission (IEC) 62494-1 has defined the exposure index (EI) that have a proportional relationship with the dose incident on the image receptor, and target exposure index (EIT), deviation index (DI). In this study, an appropriate EIT for skull radiography was established through the diagnostic reference level (DRL) and changes in DI were confirmed. Entrance surface dose (ESD) and EI were obtained using the computed radiography system displayed the EI as per IEC on console and skull phantom by experiment based on the national average exposure conditions announced in 2012 and 2019. And appropriate EIT was established by applying the DRL in 2012 and 2019. As a results, the EIT is changed according to the change in the DRL, and the exposure condition that becomes the ideal DI according to the change in the EIT also has a difference of about 1.41 times. DRL is recommended to optimize the patient dose, however it is difficult to measure in real time at medical institutions whereas EI and DI are displayed on the console at the same time as exposure. When the EIT is set based on the DRL and the DI is closed to an ideal value, it is useful as a patient dose management tool. Therefore, when the EIT is periodically managed along with the revision of the DRLs, the patient dose can be optimized through the EI, EIT and DI.

Keywords

Acknowledgement

This work was supported by Dongseo University, "Dongseo Cluster Project" Research Fund of 2021 (DSU-20210004)

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