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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
NIOSH 1990 Sep: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;
Publication Date
Document Type
Conference/Symposia Proceedings;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
DHHS (NIOSH) Publication No. 90-108
Source Name
Proceedings of the VIIth International Pneumoconioses Conference