目的 研究矽肺的CT影像学表现 特征。方法 对我院呼吸内科的70例矽肺 患者的影像资料进行回顾性分析，比较 采用低剂量和常规剂量作为扫描条件的 CT特征结果，并观察矽肺在CT扫描结果 中的影像学特征。结果 采用低剂量和常 规剂量扫描影像统计结果(阴影大小、密 集度和分期)比较差异不具有统计学意义 (P>0.05)；70例患者均存在肺实质纤维斑 块：Ⅱ期(14例)和Ⅲ期(24例)患者；间质 纤维化：50例患者存在，Ⅱ期和Ⅲ期共有 9例患者出现纤维状密度增加和血管束变 粗，Ⅲ期中有6例患者出现了典型的小叶 间隔增厚和胸膜厚度增加；Ⅱ期(8例)和 Ⅲ期(9例)患者存在肺气肿；肺门和纵膈 淋巴结：Ⅰ期(4例)存在明显的矽粉沉着 伴肿大，Ⅱ期(6例)和Ⅲ期(12例)存在典 型的斑点状钙化；Ⅱ期(7例)和Ⅲ期(16 例)存在典型胸膜厚度增加。结论 矽肺在 CT扫描中的影像特征结合患者生活情况可 做出明确诊断；低剂量CT可作为矽肺患者 筛查疾病的辅助检查。

Objective To investigate the CT image performance characteristics analysis of silicosis. Methods 70 cases with silicosis in our hospital were selected and retrospectively analyzed. Compare low dose and regular dose CT scanning feature results, observe CT image performance characteristics analysis of silicosis. Results Statistic results (shadow size, intensity and staging) between low dose and regular dose had no statistic significant (P>0.05). 70 cases all had pulmonary parenchyma; fibrous plaque:Ⅱstage (14 cases) and Ⅲ stage (24) cases, interstitial fibrosis: 50 cases existed, there were 9 cases inⅡstage and Ⅲ stage had increased fibrous thickening and thickening blood vessel bundle, There were 6 patients with typical interlobular septal thickening and pleural thickening. Ⅱstage (8 csaes) and Ⅲ stage (9 cases) had emphysema; Hilar and mediastinal lymph nodes: stage Ⅰ (4 cases) there is a clear silicone powder with swelling,Ⅱstage (6 cases) and Ⅲ stage (12 cases) existed typical punctate calcification.Ⅱstage (7 cases) and Ⅲ stage (16 cases) existed typical thickened pleura. Conclusion Image feature of silicosis on CT scan and life condition can make accurate diagnose; low dose CT can be seen as auxiliary examination on silicosis.