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J Occup Health year 2001 volume 43 number 1 page 24 - 31
Classification Original
Title The Japanese Classification of Computed Tomography for Pneumoconioses with Standard Films: Comparison with the ILO International Classification of Radiographs for Pneumoconioses
Author Narufumi SUGANUMA1, Yukinori KUSAKA1, Yutaka HOSODA2, Hisao SHIDA3, Hiroshi MORIKUBO3, Yasuo NAKAJIMA4, Masanori AKIRA5, Toru MATSUMOTO6 and Yomei HIRAGA7
Organization 1Department of Environmental Health, Fukui Medical University School of Medicine,
2Radiation Effects Research Foundation, 3Rosai Hospital for Silicosis, 4Department of Radiology, St. Marianna University School of Medicine, 5Department of Radiology, National Kinki Chuo Hospital for Chest Diseases, 6Division of Advanced Technology for Medical Imaging, National Institute of Radiological Science and 7Sapporo Railway Hospital
Keywords Pneumoconiosis, Computed tomography, Standard films, Classification, ILO, Small rounded opacities
Correspondence N. Suganuma, Department of Environmental Health, Fukui Medical University School of Medicine, Fukui 910-1193, Japan
Abstract The Japanese Classification of Computed Tomography for Pneumoconioses with Standard Films: Comparison with the ILO International Classification of Radiographs for Pneumoconioses: Narufumi SUGANUMA, et al. Department of Environmental Health, School of Medicine, Fukui Medical University-Objective: Computed tomography (CT) has recently come to be used for personal diagnosis of pneumoconioses and preliminarily for epidemiological purposes. This study aimed to compare the diagnosis of pneumoconioses by the Japanese Classification of CT for Pneumoconioses (Hosoda-Shida Classification) with that by the ILO International Classification of Radiographs of Pneumoconioses (ILO 1980 standard). The Hosoda-Shida Classification is also described in this article. Subjects and Methods: CT and chest posterior-anterior X-ray (CXR) were performed in 21 subjects with an occupational history of mining, and 6 subject without exposure to any risk of pneumoconiosis. Three radiologists independently described the findings of CT and CXR according to both the Hosoda-Shida Classification and the ILO 1980 standard, respectively. Results: At least two of the three readers agreed in determining both the profusion and the type of small rounded opacities in 96% (26/27) of the CT films. The inter-reader agreement of profusion was satisfactory with the Cohen's weighted kappa value of 0.57 to 0.71. The weighted kappa for CXR and CT in describing the profusion and the type of small rounded opacities were 0.70 and 0.77, respectively. Conclusion: The Hosoda-Shida Classification for pneumoconioses is shown to be reliable and compatible with the ILO 1980 standard in describing the profusion and the type of small opacities.