目的　采用同层动态CT增强扫描评价肺孤立性结节。方法　选择直径≤ 4cm的周围型肺癌 2 9例和肺结核球 7例 ,行同层动态CT增强研究 ,绘制其时间 -密度曲线。结果　肺癌与肺结核球的动态增强峰值差别较大。结论　同层CT动态增强扫描有助于肺癌与肺结核的鉴别诊断 Objective To evaluate the solitary pulmonary nodules by dynamic contrast-enhanced CT scan. Methods 29 cases of peripheral lung cancer ≤ 4 cm in diameter and 7 cases of tuberculous spondylitis were selected. The dynamic contrast-enhanced study (CT) of the same layer was performed and the time-density curve was drawn. Results There was a significant difference between the dynamic enhancement peaks of lung cancer and tuberculosis. Conclusions CT dynamic contrast-enhanced scan is helpful to the differential diagnosis of lung cancer and pulmonary tuberculosis