原发性支气管肺癌的MRI诊断—附73例MRI表现分析

作者分析了73例经病理证实为肺癌的MRI 表现。将肺癌的形态特点,肺癌侵犯纵隔、胸膜及胸壁的MRI 表现,肺癌侵犯支气管以及肺癌淋巴结转移等四方面进行综合分析,指出肺癌在MRI 上的诊断主要依靠形态学特征。肺癌在T_1W 或ECG-G-MRI 上呈中等信号,与肌肉组织MR 信号相似,大多为均质性;在T_2W 上多呈不均匀高信号。肺癌病灶可有坏死、液化、空洞或出血等改变。MRI 对肺癌侵犯支气管、侵犯胸膜或胸壁、侵犯纵隔内器官及伴发胸水等征象的显示非常有效,当发现伴有上述征象时可强烈支持肺癌的诊断。MRI 上很易发现肺门及纵隔内肿大淋巴结,极易与纵隔肺门之血管影鉴别。

MRI Diagnosis of Primary Bronchogenic Carcinoma

The findings of seventy-three patients with pathologically comfirmed bronchogeniccarcinoma were analysed in four aspects:the morphological appearances of the carcinomatous masses;theinvasions of the mediastinum,the pleura and the chest wall;the bronchial abnormalities;and hilar andmediastinal lymph node matastases.The nodules of the carcinoma have generally mediate MR signalintensity with homogeneous appearance on T_1W images,and high MR signal intensity withinhomogeneous appearance on T_2 W images.Also the cavities,necroses,hemorrhages may be seen in thetumors.MRI is an efficient modality to show the carcinomatous invasions of the mediastinum,the pluraland the chest wall,the bronchial abnormalities and plural effusions those are very strong evidances to thediagosis of the bronchogenic carcinoma.The enlarged hilar and mediastinal lymph node are very easy to befound and located and readily to be distinguished from hilar and mediastinal vessels on MRI images.