目的　探讨增强ＣＴ扫描鉴别诊断肺内孤立性结节的意义以及强化程度与富血管度的关系。方法　病理证实的肺癌１１例、炎性结节１３例、结核瘤６例，术前行ＣＴ平扫和以２．５ｍｌ／ｓ速率注入碘造影剂１００ｍｌ后增强扫描，观察病灶强化程度及强化形态，并计算以上３０例病灶的手术切除标本的血管数目，与术前增强ＣＴ扫描强化程度做相关分析。结果　恶性肿瘤的强化程度明显高于结核（Ｐ＜０．０１）。两者的强化形态也不同。恶性肿瘤与炎症强化程度无显著差异（Ｐ＞０．０５），两者强化形态亦无明显不同。观察手术切除标本，病灶强化程度与富血管度有相关性。结论　ＣＴ平扫不能鉴别肺内孤立性结节的性质。增强ＣＴ扫描肿瘤与结核的强化程度及强化形态均不同，可以进行鉴别。但恶性肿瘤与炎性结节强化程度无显著差异，强化形态也相似，故不易鉴别。病灶强化程度反映其富血管度。 Objective To investigate the significance of differential diagnosis of solitary pulmonary nodules by enhanced computed tomography (CT) and the relationship between enhancement degree and vasopressin. Methods 11 cases of pathologically confirmed lung cancer, 13 cases of inflammatory nodules and 6 cases of tuberculoma were enrolled in this study. Preoperative CT scan and 100ml injection of iodine contrast agent at a rate of 2.5ml / s were performed to observe the degree of enhancement and enhancement , And the number of blood vessels in the surgically resected specimens of the above 30 lesions was calculated and correlated with the degree of enhancement of preoperative enhanced CT scan. Results The degree of enhancement of malignant tumors was significantly higher than that of tuberculosis (P <0.01). The two strengthen the form is also different. There was no significant difference between the degree of enhancement of malignant tumor and inflammation (P> 0.05). There was no significant difference between the two forms. Surgical resection specimens were observed, and the degree of enhancement of the lesion was correlated with the degree of vascularization. Conclusion CT scan can not identify the nature of solitary pulmonary nodules. Enhanced CT scan Tumor and tuberculosis enhancement and enhanced morphology are different, you can identify. However, the degree of enhancement of malignant tumors and inflammatory nodules was no significant difference, strengthen the form is also similar, it is not easy to identify. The degree of enhancement of the lesion reflects its vascularization.