Cancer Risk Associated With Radiation Doses Used for CT Scans in Pediatric and General Hospitals

Area of Science:

• Radiology
• Pediatric Imaging
• Radiation Oncology

Background:

• Computed tomography (CT) is a vital diagnostic tool in pediatric care.
• Radiation exposure from CT scans is a concern due to potential long-term health risks, including cancer.
• Variations in CT radiation dosing across different healthcare settings may impact patient outcomes.

Purpose of the Study:

• To document radiation doses for common CT scans in pediatric patients across various hospital types.
• To evaluate the impact of observed dose variations on estimated lifetime cancer risks in children.

Main Methods:

• A retrospective cohort study analyzed 192,185 CT scans from a large CT dose registry.
• Scans were categorized by body region, clinical indication, and dose levels.
• Radiation doses were compared between hospital types, and excess cancer risks were calculated using the National Cancer Institute Cancer Risk calculator.

Main Results:

• Pediatric hospitals showed 20-30% lower doses for routine head and abdomen/pelvis CT in older children (12-<21 years).
• For younger children (<12 years), pediatric hospitals had lower head CT doses but higher chest CT doses (30-100%).
• An estimated 5500 excess cancers are linked to annual pediatric CT radiation, with 1200 attributed to dose differences.

Conclusions:

• Pediatric CT radiation doses contribute to an estimated 5500 future cancers annually.
• Dose variations account for approximately 1200 excess radiation-associated cancers.
• Further research is needed to understand dose variation causes and ensure optimal pediatric CT protocols.