Gd－DTPA增强MRI对肺癌的分期价值

利用平扫和Ｇｄ－ＤＴＰＡ（二乙二胺五醋酸钆·马根维显）增强ＭＲＩ图像对３８例原发性支气管肺癌的ＴＮＭ分期进行了分析，并与ＣＴ和病理分期结果进行了对照。重点评估了Ｔ因素分期的四项指标：（１）侵犯胸膜；（２）侵入纵隔；（３）与周围肺组织继发性改变（阻塞性肺炎和肺不张）的鉴别；（４）胸内淋巴结转移。结果显示：对侵犯胸膜的显示，ＭＲＩ与ＣＴ相似，其敏感性分别为４０％和７５％，特异性为８６％和９３％，准确性为７４％和８９％；对侵犯纵隔的显示，ＭＲＩ比ＣＴ敏感，特异性和准确性相似。

Value of Gd-DTPA Contrast Enhanced MRI for the Staging of Bronchogenic Carcinoma

Thirty eight patients with primary bronchogenic carcinoma were included in a prospective study to assess the staging capabilities of plain and contrast enhanced magnetic resonance imaging in comparison with the results of CT and histopathological staging.The evaluation focused on the following T staging criteria: (1) direct invasion of the pleura; (2) neoplastic invasion of the mediastinum; (3) differentiation of the primary tumor from alterations of the surrounding lung parenchyma such as inflammation or atelectasis; (4) intrathoracic lymph node involvement by tumor.The results showed: MRI and CT produced similar results for pleurel invasion (sensitivity of 40% and 75% respectively and a specificity of 86% and 93% respectively).MRI is advantageous in the sensitivity of mediastinal invasion and similar in the specificity and accuracy.