
Radiation From Routine Tests Doesn’t Give You Cancer
Getting any medical test can be scary. Some worry that X-rays, mammograms, and other routine diagnostic tests that use radiation may increase their cancer risk. Cancer is the uncontrolled growth of cells caused by changes or mutations to DNA. Exposure to high doses of radiation results in cancer-causing DNA mutations. However, the amount of radiation required to cause cancer is much, much higher than the tiny amount from a medical test.
Most of the data we have about cancer caused by radiation comes from survivors of massive radiation exposure, like the atomic bombing of Japan or nuclear disasters. It would take dozens of X-rays to increase your cancer risk by even a tiny fraction of a percent. Additionally, the danger of not diagnosing the serious illnesses that these screens look for is much greater than any risks of the tests. If you are concerned about radiation exposure from medical tests, you can ask your doctor about alternatives and keep track of exposures.