Diagnostic imaging in perspective.
D003201:Computers; D003365:Costs and Cost Analysis; D006801:Humans; D011787:Quality of Health Care / Q000191:economics*; D011859:Radiography / Q000706:statistics & numerical data; D011877:Radionuclide Imaging / Q000191:economics / Q000706:statistics & numerical data*; D014463:Ultrasonography; D014481:United States