Abstract
The diagnostic accuracy of direct digital radiography for the detection of small experimentally made periapical lesions was evaluated. A comparison was made between original digital images and images processed with different enhancement facilities of the digital system. Seven observers assessed the digital images in original mode and after individual image treatment. The diagnostic accuracy was calculated. The processing functions used by the observers were recorded, and the effect of processing was evaluated. The overall diagnostic accuracy was not different for the two image modes. Neither were the individual results of the observers different. The image processing was most effective when alterings of contrast and brightness were used. More complicated processing procedures had less effect on the diagnostic accuracy. Image processing of direct digital images of high quality has a limited effect on the diagnostic accuracy. Basic processing functions, that is, alterings of contrast and brightness, were preferred for the detection of periapical lesions.
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