[Evaluation of performance in diagnosis of pneumoconiosis using FCR (Fuji Computed Radiography)]

The purpose of this study was to determine the applicability of the FCR system to the diagnosis of pneumoconiosis. In the study, images of pneumoconiosis obtained by FCR were collected from the Rosai Hospital for Silicosis, and the distribution, shape and size of small opacities of pneumoconiosis were determined by three of the authors. An image data base was prepared, and diagnosis of pneumoconiosis using FCR test films was performed by 12 physicians with reference to reduced ILO films. Among the data obtained, data relating to profusion were analyzed. The results were compared with those obtained in the previous study. It was found that, if suitable image processing was carried on FCR test films, profusion could be classified with an accuracy equal to that of the diagnosis of pneumoconiosis with usual full-size films. It was necessary to establish standard films obtained by FCR in order to improve the accuracy of diagnosis of pneumoconiosis using FCR.