title: Second John MacIntyre memorial lecture. Grooves of change.
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011835:Radiation Protection; D011859:Radiography / Q000266:history / Q000295:instrumentation / Q000639:trends*; D011872:Radiology Department, Hospital / Q000639:trends; D012606:Scotland