CT scans have revolutionized modern medicine by providing doctors with a detailed look inside the body, aiding in cancer diagnosis and treatment. However, a recent study published in Jama Internal Medicine suggests that relying too heavily on this technology may lead to an alarming increase in cancer cases.
According to the study, CT scans performed in the US in 2023 could be responsible for around 5% of all new cancers diagnosed each year, resulting in over 100,000 extra cancer cases. The risks associated with CT scans are particularly high for children and teenagers due to their developing bodies, which may not show signs of damage caused by ionizing radiation until years later.
The study found that lung, colon, bladder, and leukemia are the most common cancers linked to CT exposure. Breast cancer is also a significant concern for women. While the risk from a single scan is low, over 90% of CT scans are performed on adults, who face the largest overall impact.
In contrast to previous estimates, which projected around 29,000 future cancers linked to CT scans in 2009, this latest analysis shows that the number has grown significantly due to advancements in research allowing for a more detailed analysis of radiation exposure. The study warns that if current trends continue, CT-related cancers could match those caused by well-known risk factors like alcohol and excess weight.
To mitigate these risks, doctors stress that CT scans are often life-saving and essential in many cases. However, they must be used judiciously to minimize unnecessary exposure to ionizing radiation. Newer technologies such as photon-counting CT scanners and MRI scans offer lower doses of radiation or none at all, reducing the risk.
While this study does not prove a direct link between CT scans and cancer, it highlights the need for responsible use of diagnostic tools. By adopting safer alternatives, cutting down on unnecessary scans, and minimizing exposure to ionizing radiation, we can ensure that CT scans continue to save lives without putting patients at undue risk.
Source: https://theconversation.com/could-ct-scans-be-fuelling-a-future-rise-in-cancer-cases-as-a-new-study-suggests-254633