MRI与CT对恶性胸膜间皮瘤的诊断价值比较

目的：探讨、比较MRI和CT在恶性胸膜间皮瘤临床诊断中的意义。方法：25例经病理组织学或细胞学证实的恶性胸膜间皮瘤患者，术前均进行了MRI和CT检查；比较分析其影像学表现特点及其临床意义。结果：MBI除了对肿瘤内钙化的显示率低于CT外，对恶性胸膜间皮瘤形态学的观察普遍优于或等于CT，尤其对叶间胸膜及横膈膜增厚的显示、肿块侵犯胸壁或膈肌以及肺门或纵隔淋巴结构的显示优于CT。恶性胸膜间皮瘤在T1WI上呈低信号或等信号，而在T2WI及增强T1WI上绝大部分呈高信号。结论：与CT比较，MRI对恶性胸膜间皮瘤的TNM分期以及治疗方案的制订更具指导意义。

A comparative study on MRI versus CT diagnosis in malignant pleural mesothelioma

Aim: To explore and compare the clinical diagnostic importance of MRI versus CT in malignant pleural mesothelioma. Methods: Twenty-five cases of malignant pleural mesothelioma were verified by histology or cytology. All of them were examined with both MRI and CT. The imaging characteristics and their clinical diagnostic importance were analysed comparatively. Results: Except for the experssivity of calcification of tumor, MRI had commonly superior detection and evaluation of morphology in malignant pleural mesothelioma, especially in the detection of interlobular and/or diaphragmatic pleural thicking, the infiltration of chest wall and/or diaphragm, and the lymphatic adenopathy of hila and/or mediastinum. Malignant pleural mesothelioma appeared to be hypointense or isointense on T1-weighted images, while the most of cases appeared to be hyperintense both on T2-weighted and enhanced T1-weighted images. Conclusion: Compared to CT, MRI is more useful in the TNM staging and treatment planning of malignant pleural mesothelioma.