[Diagnostic value and clinical application of CT/HRCT for coal workers' pneumoconiosis with large opacities].

Objective: To study the diagnostic value of CT/HRCT for the coal workers' pneumoconiosis (CWP) with large opacities.

Methods: Sixty-two patients with CWP were examined with both chest radiograph and CT/HRCT scan. Comparison was done.

[The diagnostic value and morphologic manifestation of high resolution computerized tomography in coal miner's pneumoconiosis with pleural pathological changes].

Objective: To analyse CT and high resolution computerized tomography (HRCT) diagnostic value and morphologic manifestation in coal miner's pneumoconiosis with pleural pathological changes.

Methods: One hundred and thirty-one cases of coal miner patients with pneumoconiosis (0(+) type: 14 cases, type I: 46 cases, type II: 58 cases, type III: 13 cases) and 20 normal people as control group were first examined by routine CT scan at 4 fixed slices, followed by HRCT examination at the region of interest (ROI). Meanwhile, all of them had high-kV chest radiography.

[Application of T grain technique to the diagnosis of lung disease and analysis of its image quality].

Objective: To compare the image quality of T grain green sensitive film (TML-1) and Lanex Gd(2)O(2)S rare earth intensifying screen with that of XK-1 blue sensitive film and calcium tungstate (CaWO(4)) intensifying screen, and to study the application of T grain technic to the diagnosis of lung diseases.

Methods: 160 coal miners were randomly selected to take both TML-1 and XK-1 chest film of high kV radiographs at the same time. Silver halide granule, fluorescence of intensifying screen, radiographic parameters, the density at different points in the lung and chest radiographs were observed.

[CT quantitative study of coal miner's pneumoconiosis].

Objective: To study the value of CT quantitativeness in the diagnosis of coal miner's pneumoconiosis.

Methods: 104 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).