Researchers have estimated that nearly 103,000 future cancers can be attributed to current use of computed tomography (CT) scans in the United States. The study, published in JAMA Internal Medicine, used data from over 140 healthcare facilities and estimated radiation exposure from CT scans could increase lifetime cancer risk.
According to the study, 93 million CT scans were performed in 2023, with most being conducted on adults. The researchers found that abdominal and pelvic CT scans contributed to the largest number of projected cancers, with lung cancer and colon cancer being the most common types. Children under 18 were more likely to develop cancer from CT scans due to higher radiation exposure.
While the study’s findings are concerning, researchers emphasize that the benefits of CT scans often outweigh the risks for individual patients. However, reducing unnecessary CT scans and lower doses per scan can help minimize cancer risk without compromising diagnosis.
Experts say that using alternative imaging techniques like ultrasound and magnetic resonance imaging, which don’t use ionizing radiation, can reduce cancer incidence. Additionally, minimizing radiation exposure by using the lowest dose necessary for accuracy can also save lives.
Source: https://www.nih.gov/news-events/nih-research-matters/radiation-ct-scans-cancer-risks