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An algorithm for the detection of small rounded pneumoconiosis opacities in chest x-rays and its application to automatic diagnosis.
Watanabe T; Kobatake H
Proceedings of the VIIth International Pneumoconioses Conference, August 23-26, 1988, Pittsburgh, Pennsylvania, USA. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 90-108, 1990 Sep; (Part I):492-494
A new method was presented to identify small rounded opacities of pneumoconiosis and to classify the grade of their density. The new method was based on the processing of local density patterns. The method was used in the processing of 11 International Labor Office 1980 standard films whose opacity shapes were rounded. Pneumoconiosis opacities identified by an expert reader and those detected by the proposed method were compared. The number of pneumoconiosis opacities identified by an expert reader and that detected by the proposed method were 120 and 109, respectively. Among them, 66 opacities coincided with each other. The proposed method was not sensitive to the changes of film quality, which was superior to texture analytic approaches. The correct classification rate by the proposed method was demonstrated to be comparable to them. However, many false opacities were detected as pneumoconiosis opacities; therefore, the authors conclude that further improvement of the method is needed.
Diagnostic techniques; Clinical diagnosis; X ray diagnosis; Lung disease; X ray analysis; Pulmonary disorders; Radiographic analysis
DHHS (NIOSH) Publication No. 90-108
Proceedings of the VIIth International Pneumoconioses Conference, August 23-26, 1988, Pittsburgh, Pennsylvania, USA
Page last reviewed: June 15, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division