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Related Experiment Videos

CT doses in children: a multicentre study.

J Pages1, N Buls, M Osteaux

  • 1Vrije Universiteit Brussel, Applied Sciences Faculty, Pleinlaan 2, 1200 Brussels, Belgium.

The British Journal of Radiology
|November 19, 2003
PubMed
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Paediatric CT scans often exceed radiation dose reference levels, even when protocols adjust for patient size. Inconsistent parameter selection leads to unnecessary radiation exposure in children.

Area of Science:

  • Medical Imaging
  • Radiology
  • Radiation Protection

Background:

  • Computed Tomography (CT) is widely used in paediatric imaging.
  • Optimizing scanning parameters is crucial to minimize radiation dose in children.
  • Variability in CT protocols across institutions can lead to inconsistent patient dosimetry.

Purpose of the Study:

  • To evaluate paediatric CT examination protocols in Belgian hospitals.
  • To assess if scanning parameters are adjusted based on patient size.
  • To compare patient radiation doses against established reference levels.

Main Methods:

  • Analysis of CT protocols for common paediatric procedures (brain, thorax, abdomen) across four hospitals.
  • Evaluation of radiation dose metrics: Weighted CT dose-index (CTDI(w)), dose-length product (DLP), and effective dose (E).

Related Experiment Videos

  • Dose assessment for three age groups (1, 5, and 10 years).

    • Main Results:

    • CTDI(w) and DLP values exceeded reference levels in all evaluated examinations.
    • Effective dose (E) varied significantly by examination type, ranging from 0.4 mSv (paediatric brain) to 19.9 mSv (paediatric abdomen).
    • Most centres adjusted protocols for patient size, but methods varied, and some parameter choices (e.g., fixed mAs, reduced pitch) increased doses in smaller children.

    Conclusions:

    • Current paediatric CT protocols frequently result in doses above recommended levels.
    • Inconsistent application of size-specific adjustments and suboptimal parameter selection contribute to excessive radiation exposure.
    • Tailoring CT parameters to examination type, age, and size is essential for radiation dose optimization in paediatric patients.