title: Assessment of calcific aortic stenosis by measurement of area circumscribed by calcium on plain film orifice-view roentgenograms.
mesh_terms: D001021:Aortic Valve / Q000000981:diagnostic imaging; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging*; D002114:Calcinosis / Q000000981:diagnostic imaging*; D006801:Humans; D008722:Methods; D011859:Radiography; D012044:Regression Analysis