Approximately one in three radiology recommendations that call for additional clinical action are not abided by, according to a large retrospective study. And nearly half of those directives are not even acknowledged. The findings suggest the need for better communication and technology to protect patients from possible harm. "We were concerned because we had a number of cases in which we made a recommendation that was not followed, and it turned into a problem," study investigator Alexander Norbash, MD, from the University of San Diego, said here at the American Roentgen Ray Society 2016 Annual Meeting.