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Comparison of Laboratory and Clinical Evaluations of Mammographic Screen-Film Systems

机译：乳腺摄影屏 - 胶片系统实验室和临床评价的比较

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The widely used DuPont Lo-dose mammography screen-film system was compared with four combinations of higher efficiency screens and single-emulsion films. Laboratory comparisons of the basic image properties (resolution, noise, contrast) of all these screen-film combinations were made both qualitatively (images of microwire meshes, tiny plastic beads, step wedges) and quantitatively (modulation transfer functions, Wiener spectra, step wedge optical density differences). Subjective single-blind estimations of resolution, noise, and contrast were also made directly from the mammograms of 100 consecutive patients radiographed with each of the five screen-film combinations. Both laboratory and clinical evaluations of image quality showed strikingly similar results: improved contrast, minimally reduced resolution, and varying degrees of increased noise for each of the high efficiency recording systems. Similarities between the results of laboratory and clinical studies should help to establish the clinical relevance of the laboratory analyses, and recognition of the relative precision of the clinical evaluations should allow for their use in place of laboratory studies when sophisticated physics support is not available. (ERA citation 04:043814)

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