Pediatric radiation exposure during the initial evaluation for blunt trauma

Area of Science:

• Medical Imaging
• Pediatric Radiology
• Radiation Oncology

Background:

• Computed tomography (CT) utilization in pediatric blunt trauma is increasing.
• Children are more susceptible to radiation-induced carcinogenic effects due to smaller body size.
• Current CT protocols may expose pediatric patients to radiation doses associated with increased cancer risk.

Purpose of the Study:

• To quantify radiation doses in pediatric blunt trauma patients during initial CT evaluations.
• To assess if these doses exceed levels historically linked to increased thyroid cancer risk.

Main Methods:

• Prospective cohort study of pediatric patients (0-17 years) over 6 months.
• Dosimeters measured surface radiation on the neck, chest, and groin during CT scans.
• Cumulative effective whole body and organ doses were calculated.

Main Results:

• Mean whole body effective dose was 17.43 mSv; mean organ doses included thyroid (32.18 mGy), breast (10.89 mGy), and gonads (13.15 mGy).
• 71% of patients received thyroid doses within the range correlated with increased thyroid cancer risk.
• Patients undergoing selective CT scanning (≤2 scans) had significantly lower radiation doses compared to those with >2 scans.

Conclusions:

• Thyroid radiation doses in a majority of pediatric blunt trauma patients exceed cancer risk thresholds.
• Whole body effective doses also fall within ranges linked to increased risks of solid cancers and leukemia.
• Selective CT scanning significantly reduces overall radiation exposure in pediatric blunt trauma patients.