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[Scientific Research Group Report: Nationwide Survey on Radiation Exposure of Pediatric CT Examination in Japan

Yasutaka Takei1, Osamu Miyazaki2, Kosuke Matsubara3

  • 1Department of Radiological Technology, Faculty of Medical Science and Technology, Kawasaki University of Medical Welfare.

Nihon Hoshasen Gijutsu Gakkai Zasshi
|March 3, 2022
PubMed

Insights

Pediatric computed tomography (CT) scans show reduced radiation dose (CTDIvol) due to advanced technology. However, dose-length product (DLP) for head and abdominal scans may exceed national guidelines, necessitating protocol review.

Area of Science:

  • Radiology
  • Medical Physics
  • Pediatric Imaging

Background:

  • National Diagnostic Reference Levels (DRLs) require regular updates based on current practices.
  • Pediatric computed tomography (CT) protocols are evolving with technological advancements.

Purpose of the Study:

  • To assess current pediatric CT radiation exposure levels.
  • To inform the revision of national DRLs for pediatric CT examinations.

Main Methods:

  • A nationwide survey was conducted using questionnaires.
  • Investigated imaging conditions, CTDIvol, and DLP for pediatric head, chest, and abdominal CT.
  • Data collected from facilities with members of Japanese radiological societies.

Main Results:

  • 11% of facilities responded; all utilized multi-detector row CT (MDCT) systems (mostly >64 detector rows).
  • CTDIvol was generally below national DRLs due to MDCTs and iterative reconstruction.
  • DLP for pediatric head and abdominal CT exceeded national DRLs in some age groups.

Conclusions:

  • Despite technological improvements reducing CTDIvol, DLP variations necessitate attention.
  • Review of pediatric CT imaging protocols with physicians and radiologists is crucial.
  • Further optimization of medical radiation exposure in pediatric CT is recommended.
Abstract

Keywords:
computed tomography (CT)diagnostic reference level (DRL)pediatricradiation doserevise

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