Methods:124 cases of coal miner were first examined by routine CT scan followed by HRCT examination at top of aortic arch,carina of trachea,3 cm below the bifurcation of bronchi and 2 cm above the right diaphragm as well as other interesting regions.

• 方法：124例煤工尘肺作肺部常规CT，然后在主动脉弓顶、隆突水平、气管分叉下3cm右膈上2cm及重点兴趣区加作HRCT，对其图像表现进行研究。