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CTs are given to people in emergency departments who have had serious trauma or are having a suspected stroke.

Other CTs are used to identify and treat cancer, rule out serious neurological problems, and more.

The authors found that in 2023 there were 93 million CTs done on 62 million patients.

The total estimated lifetime number of cancers caused by the radiation from these CTs in their model came out to about 100,000.

So for the 62 million people who got CTs over the course of 2023, there would eventually be an additional 100,000 cancers.