目的　评价同层 CT动态增强扫描技术在肺孤立性结节诊断中的价值。　方法　回顾性总结手术治疗的4 2例肺孤立性结节病变患者的临床资料 ,分析 CT动态增强扫描前后 CT增强值的变化 ,与术后病理检查的结果比较。　结果　肺癌和肺炎性假瘤显著强化 ,肺结核球和肺错构瘤轻度强化或不强化 ,肺癌患者 CT动态增强扫描在 85秒和 135秒 CT值与其它病变比较差别有显著性意义 (P<0 .0 5 )。　结论　同层 CT动态增强扫描对肺孤立性结节的鉴别诊断有一定的价值 ,术前应常规进行 CT动态增强扫描并对淋巴结进行观察 ,有助于手术方案的选择 Objective To evaluate the value of dynamic contrast-enhanced CT in the diagnosis of solitary pulmonary nodules. Methods The clinical data of 42 patients with solitary pulmonary nodules who underwent surgical treatment were retrospectively reviewed. The changes of CT enhancement before and after CT dynamic contrast-enhanced scanning were analyzed and compared with the postoperative pathological findings. Results Lung cancer and pulmonary inflammatory pseudotumor were significantly enhanced, and pulmonary tuberculosis and pulmonary hamartoma were mild or no enhancement. CT dynamic contrast-enhanced CT scan at 85 and 135 seconds in lung cancer patients showed significant difference compared with other lesions (P < 0 .0 5). Conclusions CT dynamic contrast-enhanced MRI has some value in the differential diagnosis of solitary pulmonary nodules. Preoperative CT dynamic contrast-enhanced scanning and lymph node observation are helpful to the choice of surgical procedure