A CT scan is a type of cross sectional x-ray which involves children lying still in a machine on a table and moving through the middle of a ‘dough-nut’ shaped machine. It can last from a few minutes to 10-20mins. Occasionally younger children need an anaesthetic to keep them still.

A CT scan does involve a dose of radiation but as technology improves over time the dose becomes smaller. Sometimes the procedure also involves intravenous contrast or oral contrast to optimise the findings of the scan.