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[Computer-assisted image postprocessing in intraoral digital radiography]
F Lazzerini1, R Nessi, A Freschi
1Istituto di Scienze Radiologiche, Università degli Studi, Milano.
Introduction:
Computer-assisted postprocessing was performed on selected digital dental radiographs using a professional software for photographic retouching.
Materials And Methods:
The optical characteristics of 22 digital intraoral images (radio-videographies) taken on 18 patients were modified as regards their density and contrast values. Three different kinds of densitometric curves, corresponding to particular changes in post-processing parameters, were preliminary defined as the most effective for the demonstration of root canals and of alveolar bone. They were then applied to each X-ray image and the pictures thus modified were subsequently printed and read on a blind basis by three observers who considered the conspicuity of each structure of interest (root canals and alveolar bone).
Results:
The results, submitted to statistical analysis, demonstrate that computer-assisted postprocessing can improve the visual yield and the diagnostic effectiveness of digital dental images in 67% of cases for the periapical bone and in 86% of cases for the root canals.
Conclusions:
The most effective sets of post-processing parameters established for each structure of interest are proposed together with a pre-programmed function to be introduced into the software of digital radiographic equipments.