Who's there? A radiologist studies digital X-rays in a viewing room at what is now called the Walter Reed National Military Medical Center in Bethesda, Md. Seth Rossman/U.S. Navy hide caption toggle caption Seth Rossman/U.S. Navy Shots - Health News Radiologists Say It's Time To Come Out Of The Dark November 30, 2012 Radiologists have an image problem with patients. Many of them don't know who the doctors are or what they do. A survey finds that only about half of patients receiving CT scans even knew radiologists are doctors.