目的探讨纵隔型肺癌CT及MRI的 临床表现及诊断效果。方法 从本院2013 年5月-2014年5月收治的纵隔型肺癌患者 中随机选择20例进行研究，分别利用CT及 MRI进行检查，比较具体的临床表现以及 诊断效果。结果 20例患者均经病理学分 析，12例为中央型肺癌，8例为周围型肺 癌。经CT检查可观察到肿块边缘不规则， 外缘呈毛刺、分叶状，纵隔淋巴结出现肿 大，并伴有肺不张和阻塞性肺炎。经MRI 检查还可以较为清晰的观察到肿块侵及胸 壁、胸膜、胸椎。CT及MRI的诊断灵敏度 均显著高于X线检查，经比较差异有统计 学意义，(Χ2 =10.52，P＜0.05)；但CT及 MRI诊断灵敏度二者间比较差异无统计学 意义，(Χ2 =0.00，P＞0.05)。结论 CT及 MRI检查在纵隔型肺癌的临床诊断中可以 获得不同的影像学表现，且较之常规X线 检查，二者可以诊断灵敏度更高，可以获 得良好的诊断效果。

Objective To explore the clinical manifestations and diagnosis effect of CT and MRI of pulmonary cancer of mediastinal type. Methods 20 cases of patients with pulmonary cancer of mediastinal type in our hospital from May 2013 to May 2014were selected, and all of the patients were checked by the CT and MRI.The clinical manifestations and diagnosis effect of the two groups were observed and compared. Results All the 20 cases were confirmed by pathological analysis, 12 cases were central type lung cancer, and 8 cases were peripheral lung cancer.It could be observed in the margins of the outer edge was irregular, burr, lobulated, mediastinal lymph nodes appear swollen, accompanied by pulmonary atelectasis and obstructive pneumonia by the examination of CT.The MRI examination could clearly observed tumor invasion of the chest wall, pleura, thoracic vertebrae.The diagnostic sensitivity of CT and MRI were significantly higher than that of X-ray examination, the difference was statistically significant (Χ2 =10.52, P<0.05); however, CT and MRI in the diagnosis of sensitivity between the two had no significant difference (Χ2 =0.00, P>0.05). Conclusion The clinical diagnosis of CT and MRI examination in pulmonary cancer of mediastinal type can obtain different imaging findings, and the two person can diagnose higher sensitivity compare with conventional X-ray examination,and obtain good diagnosis results.