1.CT quantitative study of coal miner's pneumoconiosis.
Peicheng LIU ; Dun ZHANG ; Chun WU ; Hanxin SU ; Jingbo CHEN ; Guiping CAI ; Xueru AI ; A WAGULI
Chinese Journal of Industrial Hygiene and Occupational Diseases 2002;20(2):113-115
OBJECTIVETo study the value of CT quantitativeness in the diagnosis of coal miner's pneumoconiosis.
METHODS104 cases were examined by HRCT scan at top of aortic arc, carina of trachea, 3 cm below the bifurcation of bronchi, among them there were 87 patients with different stages of coal miner's pneumoconiosis, 17 cases of normal males as the control group. All images were determined by CT density histogram at specific region (- 1,024-0 HU). Calculated the percentage of each pixel included a varying number of CT value, and the ratio of density values in the specific region.
RESULTSThe ratio of density values in the region of -983 (-) -778 HU was 87.31% in normal control group, and 80.51%, 75.27% and 72.99% respectively in the I, II, III stages of coal miner's pneumoconiosis. There were statistically significant differences among the groups (P < 0.01).
CONCLUSIONCT quantitative histogram information was able to observe the fibrosis and its degree of coal miner's pneumoconiosis. It has a good diagnostic value for its reliability and objectiveness.
Coal Mining ; Humans ; Pneumoconiosis ; diagnostic imaging ; Pulmonary Fibrosis ; diagnostic imaging ; Tomography, X-Ray Computed ; methods
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