X-radiation from CT scans is estimated to cause about two percent of all cancers in the United States (New England Journal of Medicine, 2007 (Nov); 357:2277-2284). * Most decisions to order CT scans are made by physicians who do not inform their patients of the risks involved (JAMA Intern Med. March 4, 2013). * Up to one third of imaging tests in the U.S. are ordered in situations when the expected benefits do not sufficiently exceed the risks. * Two-thirds of patients in U.S. hospitals are not told that radiation from CT scans may cause cancers * When patients are fully informed, they often opt for fewer tests and less aggressive care. CT scans are used to diagnose medical problems inside the body, such as sinus infections, lung disease, brain tumors and so forth. * You can get even more information from MRIs that produce no radiation.* However, MRIs are usually more expensive than CT scans because the machines used to perform this test are more expensive. IF YOUR DOCTOR RECOMMENDS A CT SCAN: * The more radiation you receive in your lifetime, the greater your risk for cancer. * Tell your doctor that you are worried about X-radiation from CT scans. * Ask him or her if the test is really necessary, and if so, whether an MRI could be ordered instead. culled from Dr Merkin.