Estimating Radiation Dose and Proposing Institutional Diagnostic Reference Levels for Paediatric Fluoroscopy of Micturating Cystourethrogram: Age- and Weight - Specific Comparisons.

چکیده اصلی

OBJECTIVE: To compare age- and weight-specific methods used to estimate radiation doses and to propose institutional diagnostic reference levels (DRLs) for paediatric fluoroscopy of micturating cystourethrogram (MCUG). METHODS: In this retrospective study, MCUG fluoroscopy parameters were gathered for 100 paediatric patients from July 2025 to January 2026. The data included the MCUG paediatric procedures for patients aged 0-15 years. The data were categorized into paediatric weight- and age-specific groups. Paediatric weight-specific groups were ≤ 5, 5 < - 10, 10 < - 20, and >20 kg, and paediatric age-specific groups were ≤ 1, 1 < - 5, 5 < - 10, and < 10 - 15 years old. RESULTS: Differences were observed in dose area product (DAP) and DRL results for age- and weight-specific methods, especially for paediatric age groups of 1 < - 5 and 5< - 10 years old compared with paediatric weight groups of 5 < -10 kg and 10 < - 20 kg (p = 0.037 and 0.035). The proposed institutional DRLs for the MCUG fluoroscopy were 22.1, 63, 169, and 457 μGyċm2 for paediatric weight groups of ≤ 5, 5 < - 10, 10 < - 20, and >20 kg. The estimated effective doses reached 0.81, 2.18, 2.08, and 2.5 mSv. CONCLUSION: The paediatric weight-specific method shows realistic and lower DAP and DRL values. The results of DRLs for the MCUG fluoroscopy were acceptable when compared with literature results.

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