If a CT is medically necessary, then that radiation dose may well be worth the potential risk years later, Morin noted. It's inappropriate scans that are more worrisome.
If your doctor says you need a CT and you have concerns about the radiation, you should feel free to ask questions, Morin said.
"Any ordering physician should be able to tell the patient, this is why we're doing the study, and this is what we're trying to find out," Morin said.
Learn more about CT scans from the U.S. Food and Drug Administration.
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