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CT Scans Could Contribute to 5% of Annual U.S. Cancer Cases, Study Warns

A new JAMA Internal Medicine study projects over 100,000 future cancer cases from 2023 CT scans, fueling debate over risks, benefits, and mitigation strategies.

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Overview

  • The study estimates that CT scans performed in 2023 could lead to over 100,000 additional cancer cases, accounting for 5% of annual diagnoses in the U.S.
  • Infants under one year old are particularly vulnerable, with a tenfold higher theoretical cancer risk from CT radiation compared to other groups.
  • Experts emphasize that while CT scans are life-saving diagnostic tools, their overuse—especially for non-critical conditions—raises unnecessary risks.
  • The American College of Radiology disputes the study's conclusions, noting the lack of direct evidence linking CT scans to cancer in humans.
  • Researchers advocate for lower radiation dose technologies, alternative imaging methods like MRIs, and stricter guidelines to reduce unnecessary scans.