CT Scans and Cancer Risk: A Growing Concern

Recent research suggests that while CT scans are essential for diagnosing and monitoring diseases like cancer, they may also contribute to the development of cancer. CT scans use X-rays to create detailed body images, but varying radiation levels from different machines could be increasing the risk of radiation-induced cancers. A 2009 study estimated that 2% of cancers in the U.S. (around 30,000 cases annually) were linked to high doses of radiation from CT scans.

Despite their life-saving potential, CT scans are sometimes overprescribed, driven by financial incentives or fears of malpractice. A significant concern is the wide variation in radiation exposure across machines, with some scanners emitting up to 15 times more radiation than others.

Although the risk to individuals may seem small, the cumulative effect on the population could become a public health issue. Studies have shown that cancer risks from CT scans are influenced by age, sex, and the type of scan. For example, a 40-year-old woman undergoing a CT scan of arteries near her heart has a 1 in 270 chance of developing cancer due to the radiation exposure.

To address these risks, new Medicare regulations will require hospitals to monitor and report radiation levels from CT scans, starting in 2027. These measures aim to reduce unnecessary scans, ensure consistent radiation dosages, and improve patient safety.

Smith-Bindman, R. (2023, March 9). Over-used medical test given to millions a year is causing an explosion of tumors. Daily Mail. https://www.dailymail.co.uk/health/article-14482065/Over-used-medical-test-given-millions-year-causing-explosion-tumors.html