title: Are current changes unprecedented?
authors.affiliation: Department of Radiology, Indiana University School of Medicine, 702 Barnhill Dr, Room 1053, Indianapolis, IN 46202-5200, USA. rbgunder@iupui.edu
authors.forename: Richard B
authors.initials: RB
authors.lastname: Gunderman
authors.forename: Keshav
authors.initials: K
authors.lastname: Menon
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D010506:Periodicals as Topic / Q000266:history*; D011871:Radiology / Q000266:history* / Q000639:trends