动态增强CT扫描对孤立性肺结节的诊断价值

目的:探讨动态增强CT扫描对良、恶性孤立性肺结节(SPN)的诊断价值.方法:时40例SPN患者行同层动态CT增强扫描,分别在平扫及增强后30s、60s、120s和180s测量病灶的CT值,获得病灶的时间-密度曲线(TAC),并进行统计学分析.结果:小肺癌与肺炎性结节、结核瘤的平扫CT值无显著差异.增强扫描小肺癌与结核瘤的CT强化程度有显著差异,但炎性结节与小肺癌的CT强化程度无显著差异.小肺癌、炎性结节,结核瘤三种病变的TAC形态不同.结论:动态增强CT扫描能显示SPN的强化特征并有助于定性诊断,是鉴别SPN良、恶性的有效影像学方法.

Diagnostic Value of Dynamic Enhanced CT in Solitary Pulmonary Nodules

Objective:To assess the value of dynamic enhanced CT in the differential diagnosis of benign or malignant solitary pulmonary nodules(SPN).Methods:Forty patients with SPN were studied by dynamic enhanced CT,CT values of the nodules on pre and post-contrast-enhanced CT at 30s,60s,120s and 180s were measured respectively.Time attenuation curves(TAC)were created and statistical analysis was undertaken.Results:No statistical difference was existed between small pulmonary carcinoma,inflammatory nodule and tuberculoma.After contrast enhancement,there was significant statis- tical difference between small pulmonary carcinoma and tuberculoma,yet no significant statistical difference was existed be tween small pulmonary carcinoma and inflammatory nodule.TAC patterns were different for these three kinds of SPN.Con- clusion:Characteristic enhanced features of SPN can be displayed by dynamic enhanced CT,which is useful in differentiating benign from malignant lesions.