Fig. 1

Estimation of the effective dose of a 5-year-old child during a PA chest x-ray (equivalent units). a) AP pelvic radiograph (10 CXR-equivalent units); b) abdominal ultrasound (No ionizing radiation); c) abdomen and pelvic CT (1300 CXR-equivalent units); d) head CT (Pre- and Post- contrast) (1100 CXR-equivalent units); e) neck/chest/abdomen/pelvic CT (1700 CXR-equivalent units); f) head MRI (no ionizing radiation)