Reuters (3/4) reports, "Trauma patients treated in U.S. emergency" departments (EDs) "on average are exposed to radiation equivalent to 1,005 chest X-rays each, enough to raise their risk of cancer," according to a study published in the Annals of Emergency Medicine. Dr. James Winslow, of Wake Forest University in North Carolina, and colleagues looked at the "records of 86 patients who came to a level one trauma center over a three-month period." The researchers found that while the "average person living in the United States receives about three millisieverts of background radiation" annually, the patients in the study received an average of 40 millisieverts.