目的 分析CT与MRI在孤立性肺结 节性质鉴别中的应用价值。方法 收集我 院经手术、病理穿刺或随访确诊为孤立 性肺结节的54例患者的临床资料，回顾 性分析其临床资料，总结CT、MRI对孤立 性肺结节性质鉴别的临床价值。结果 CT 诊断准确率为92.59%；MRI诊断准确率为 75.93%，CT对孤立性肺结节定性准确率高 于MRI(P<0.05)。恶性结节、炎性结节强 化峰值(PH)、主动脉强化值比值(SPH/PPH) 均高于良性结节(P<0.05)，但恶性结节与 炎性结节CT增强扫描参数比较差异无统计 学意义(P>0.05)。结论 CT对孤立性肺结 节性质鉴别价值优于MRI，可清晰显示病 变形态学特点，对内部结构、钙化征显示 率好，且安全、无创、操作简单。

Objective To analyze application value of CT and MRI in diagnosis of benign and malignant solitary pulmonary nodules. Methods The clinical data of 54 patients with solitary pulmonary nodules confirmed by surgery, pathological puncture or follow-up in our hospital. The clinical data were retrospectively analyzed. CT and MRI findings of solitary pulmonary nodules were analyzed, and the clinical value of CT and MRI in diagnosis of benign and malignant solitary pulmonary nodules were summarized. Results CT diagnostic accuracy rate was 92.59%, MRI accuracy was 75.93%. The accuracy of CT was significantly higher than MRI (P<0.05). The peak heigh (PH) and the ratio of artery to pulmonary artery (SPH/PPH) of malignant nodules and inflammatory nodules were significantly higher than those of benign nodules (P<0.05) but there was no significant difference in CT contrast enhanced scan parameters between malignant nodules and inflammatory nodules (P>0.05). Conclusion Diagnostic value of CT in solitary pulmonary nodule is better than MRI. The morphological characteristics of lesions can be clearly displayed. The display rates to internal structure, and calcification signs are good. It is safe, noninvasive and easy to operate