I work in a 500 bed Level I trauma center. We run one IR room with one RN and 4 rad techs. We cover the entire imaging dept. We have 9 RN's staffing around the clock except weekend and holidays. One RN covers the night shift. We cover call rotating the holidays and cover the weekend call every 9th weekend. No weekday calls unless our night nurse is on vacation, then we just pick it up. By the way we perform around 1200 procedures per year.