Radiation dose to the lens from CT of the head in young people

Highlights: • There is a wide variation in the practice of including the eyes in CT head scans. • Lens doses strongly depend on the level of eye inclusion in the exposed region. • The majority of patients undergo a single scan only. • Single scans are unlikely to induce cataracts, regardless of eye inclusion. • Some individuals could potentially receive cumulative lens doses of several Gy. -- Abstract: To determine cumulative scan frequencies and estimate lens dose for paediatric computed tomography (CT) head examinations in the context of potential cataract risk.