CT dose indicators (CTDI) were recorded for all scans on paediatric patients from January - December 2011 and benchmarked against American College of Radiologists reference levels (75 mGy for adult head, 25 mGy for adult abdomen, and 20 mGy for paediatric (5-year-old) abdomen). Size-specific dose estimates (SSDE) were calculated based on effective patient diameter as recommended by the American Association of Physicists in Medicine