Computed tomography (CT) scans are important diagnostic tools but can present serious dangers from overexposure to radiation. Researchers reviewed 133 radiation incidents reported to one NHS trust from 2015-2018. Reported events included radiation incidents, near-miss incidents, and repeat scans. Most events were investigated using a systems approach, and staff were encouraged to report all types of incidents, including near misses, to foster a culture of safety and enable learning.