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本文对移居中度高原（２５００ｍ）２０年内６３例矽肺矿工摄后前位胸片，按居住年限梯度，自身对照，分析其Ｘ线心血管四项指标及矽肺的变化过程。结果表明：右肺下动脉横径、肺动脉段突度、降支与气管横径比值及心脏横径随居住时间延长呈增大趋势（Ｐ＜０．０１），并观察矽肺类型改变与高原低氧有一定关系。提示动态观察Ｘ线各指标及矽肺类型改变，对高原矽肺的早期诊断及防治水平研究有着极其重要的实用价值。
In this paper, 63 cases of silicosis miners who had migrated to medium plateau (2500m) within 20 years before radiography were divided into four groups according to the length of living and self-control. The changes of four indexes of X-ray and silicosis were analyzed. The results showed that the ratio of transverse diameter of the right pulmonary artery, pulmonary artery segment, ratio of trabeculectomy to tracheal diameter and diameter of heart increased with the prolongation of residence time (P <0.01). The changes of silicosis type and the low altitude Oxygen has a certain relationship. Prompt dynamic X-ray observation of indicators and changes in silicosis types, the early diagnosis of silicosis and prevention and treatment of plateau has an extremely important practical value.