我区地处洞庭湖畔,盛产稻谷,接触谷物粉尘的工人较多。为观察谷尘所致人体胸部X线阴影表现特征,我们选择从事碾米作业15年以上的120例单纯碾米工进行了胸部X线摄片,由地区尘肺诊断小组进行集体分析,并对碾米工龄15年以上碾米工较集中的某碾米厂作了现场调查,对其总的粉尘浓度、游离SiO_2含量及分散度作了测定。见表1。 My area is located in Dongting Lake, rich in rice, workers exposed to grain dust more. In order to observe the chest X-ray shadow characteristics of human chest, we choose to do more than 15 years of rice milling work of 120 simple rice milling chest X-ray, the regional pneumoconiosis diagnostic team for collective analysis, and grind A rice mill with a working length of more than 15 years was investigated on site and its total dust concentration, free SiO 2 content and dispersity were measured. See Table 1.