title: A comparative evaluation of rare earth screen-film systems. Free-response operating characteristic analysis and anatomic criteria analysis.
abstract: Diagnostic accuracy was evaluated in a signal detection experiment that used low-contrast acute lesions in a living dog model. At the high levels of certainty normally used by radiologists, rare earth screen-film systems provided accuracy comparable to that of a reference calcium tungstate screen-film system. Additionally subjective image quality evaluation for a given imaging task (clinical pediatric anterior-posterior chest films) based on visualization of anatomic landmarks and physical parameters has been conducted for several rare earth and one calcium tungstate screen-film system. The correspondence of subjective physical ranking with physical and psychophysical measurements was investigated. Evaluating the visualization of anatomic parameters can provide a clear and objective distinction among systems with comparable physical and psychophysical properties.
mesh_terms: D000818:Animals; D001699:Biometry; D003951:Diagnostic Errors; D004285:Dogs; D005069:Evaluation Studies as Topic; D008674:Metals, Rare Earth; D011856:Radiographic Image Enhancement / Q000295:instrumentation; D013902:Radiography, Thoracic; D014962:X-Ray Film; D014963:X-Ray Intensifying Screens
chemical_list: D008674:Metals, Rare Earth