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A survey of pediatric CT doses in the Shanghai metropolitan area

Heqing Lu1, Wengang Wang1, Bin Li2

  • 1Department of Medical Equipment, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai 201204, People's Republic of China.

Journal of Radiological Protection : Official Journal of the Society for Radiological Protection
|December 19, 2018
PubMed

Insights

This study assessed computed tomography (CT) radiation doses in children across Shanghai. Multi-detector CT (MDCT) head scans showed higher doses, while chest scans had lower doses compared to older CT technologies.

Area of Science:

  • Medical Imaging
  • Radiology
  • Pediatric Health

Background:

  • Computed tomography (CT) is a vital diagnostic tool.
  • Pediatric patients are more susceptible to radiation risks.
  • Standardized dose evaluation is crucial for pediatric CT examinations.

Purpose of the Study:

  • To evaluate computed tomography (CT) doses in child examinees of various ages in Shanghai.
  • To compare radiation doses across different CT scanner types (SDCT, DDCT, MDCT).
  • To assess effective doses and associated radiation risks in pediatric CT.

Main Methods:

  • Phantom measurements were used to test CT dose indices (CTDIs) on 50 CT scanners.
  • Standard imaging protocols for head and chest scans were applied.
  • CTDIw, CTDIvol, Dose Length Product (DLP), and effective doses were calculated and analyzed by age group.

Main Results:

  • Multi-detector row CT (MDCT) head scans in children resulted in higher CTDIvol, DLP, and effective doses compared to single-detector row CT (SDCT) and dual-detector row CT (DDCT).
  • MDCT and DDCT chest scans in children showed lower CTDIvol, DLP, and effective doses than SDCT.
  • Radiation risks are notably higher for children undergoing CT examinations than for adults.

Conclusions:

  • CT dose varies significantly with scanner technology and scan type in pediatric populations.
  • MDCT technology presents a higher dose burden for pediatric head CTs but potential dose reduction for chest CTs.
  • Optimizing CT protocols is essential to minimize radiation exposure and mitigate risks in children.

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