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  • Title: Detection of approximal caries with a storage phosphor system. A comparison of enhanced digital images with dental X-ray film.
    Author: Møystad A, Svanaes DB, Risnes S, Larheim TA, Gröndahl HG.
    Journal: Dentomaxillofac Radiol; 1996 Sep; 25(4):202-6. PubMed ID: 9084274.
    Abstract:
    OBJECTIVES: To compare the accuracy of approximal caries detection using enhanced and unenhanced storage phosphor images and dental X-ray film. METHODS: Fifty premolar/molar teeth were exposed simultaneously under standardized conditions on storage phosphor (SP) image plates (Digora) and Ektaspeed film. The image files were transferred to a different platform for image processing. Using a five-point confidence scale, ten observers rated 95 approximal surfaces for caries in enamel and dentin with three image modalities: enhanced and unenhanced SP images and film. The observations were validated microscopically. Diagnostic accuracy was measured as the area beneath the ROC curve (Az). RESULTS: Enhanced SP images had significantly higher Az values in both enamel (Az = 0.819) and dentin (Az = 0.845) than unenhanced images and film. No significant differences were found in either enamel or dentin between unenhanced SP images (Az = 0.780 and Az = 0.789) and film (Az = 0.688 and Az = 0.793). CONCLUSION: Enhancement of storage phosphor images improved detection of approximal caries in this in vitro study compared with unenhanced images and Ektaspeed film.
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