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CT Scans May Account for 5 Percent of US Cancers—Doctors Say the Story Is More Complex

CT scans can provide life-saving diagnostics—but are they also harming people?
CT Scans May Account for 5 Percent of US Cancers—Doctors Say the Story Is More Complex
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Sheramy Tsai
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CT scans are essential to modern medicine, quickly diagnosing conditions from strokes to cancer. However, new research suggests that the very tool used to save lives could, in some cases, contribute to future cancer cases.

A University of California–San Francisco study estimates that CT scans performed in 2023 could lead to more than 100,000 future cancer cases—about 5 percent of annual U.S. diagnoses. That level of risk is comparable with other known factors such as alcohol and obesity.
Sheramy Tsai
Sheramy Tsai
Author
Sheramy Tsai, BSN, RN, is a seasoned nurse with a decade-long writing career. An alum of Middlebury College and Johns Hopkins, Tsai combines her writing and nursing expertise to deliver impactful content. Living in Vermont, she balances her professional life with sustainable living and raising three children.