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Computed Tomography Dose in Paediatric Care: Simple Dose Estimation Using Dose Length Product Conversion
Nor Hanani Mohd Tap1, Mohamed Ariff Jaafar Sidek1, Siti Farizwana Mohd Ridzwan1
1Department of Radiology, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia.
The Malaysian Journal of Medical Sciences : MJMS
|March 28, 2019
Summary
This study estimates effective doses (EDs) from paediatric computed tomography (CT) scans. Effective dose decreases with age, with abdominal scans showing the highest radiation exposure.
Area of Science:
- Medical Imaging
- Radiology
- Radiation Dosimetry
Background:
- Increasing use of multislice computed tomography (MSCT) raises concerns about radiation exposure and cancer risk.
- Need for accessible methods to estimate effective doses (EDs) in paediatric patients.
Purpose of the Study:
- To estimate effective doses (EDs) for various paediatric computed tomography (CT) examinations.
- To analyze EDs across five age groups using age- and region-specific conversion coefficients.
Main Methods:
- Retrospective review of 211 paediatric CT scans over 12 months.
- Patients categorized into five age groups: neonatal, 1, 5, 10, and 15 years.
- Age- and region-specific conversion coefficients applied to dose length product (DLP) data.
Main Results:
- Effective doses (EDs) for brain CT ranged from 0.8 to 2.5 mSv.
- Abdominal CT scans showed the highest EDs, ranging from 7.5 to 18.8 mSv.
- Thoracic CT scans had EDs ranging from 4.2 to 7.0 mSv.
Conclusions:
- An inverse relationship observed between patient age and effective dose in CT scans of the brain and abdomen/pelvis.
- Overall effective doses in this study were lower compared to other reported centers.
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