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Updated: Aug 6, 2026
08:30
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
Survey of effective dose levels from typical paediatric CT protocols
Donald McLean1, Nathan Malitz, Sarah Lewis
1School of Medical Radiation Sciences, University of Sydney, Sydney, Australia. rdmc@imag.wsahs.nsw.gov.au
Australasian Radiology
|June 5, 2003
Summary
Paediatric CT scans can have high radiation doses, increasing cancer risk. New software helps calculate effective doses, revealing current protocols are often higher than recommended, but dose reduction is achievable through parameter adjustments.
Area of Science:
- Medical Physics
- Radiology
- Paediatric Imaging
Background:
- Concerns exist regarding elevated radiation doses and subsequent cancer risks in paediatric CT patients.
- Accurate dose assessment is crucial for optimizing paediatric CT protocols.
Purpose of the Study:
- To evaluate effective radiation doses in paediatric CT procedures.
- To compare current protocols against recommended guidelines and identify dose variation factors.
Main Methods:
- Utilized dose calculation software based on Monte Carlo simulations.
- Employed tomographic phantom models for a 7-year-old child and an 8-week-old infant.
- Surveyed nine radiology departments performing routine chest and abdominal CTs.
Main Results:
- Effective doses were higher in females than males and for abdominal compared to chest scans.
- Most centers used protocols resulting in lower effective doses than literature recommendations.
- Scan parameters (mAs, pitch) and scanner type significantly influenced dose variations.
Conclusions:
- Current paediatric CT protocols often exceed recommended effective doses, necessitating optimization.
- Scan parameter adjustments are key to effective dose reduction in paediatric CT.
- Dose calculation software is vital for assessing and improving paediatric CT protocols.
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