磁共振成像对脑静脉窦血栓形成的诊断

目的:探讨脑静脉窦血栓形成的MRI表现和成像特点。方法:回顾性分析2003年12月~2005年1月经临床确诊的13例脑静脉窦血栓形成患者的MRI表现,所有患者均行超导MRI检查,多平面图像采集,磁共振静脉造影(MRV)采用2D-TOF技术。结果:MRI特征性表现为平扫脑静脉窦内正常的流空信号消失,代之以异常的等信号或高信号。病变最常累及上矢状窦和横窦。MRV表现为受累的静脉窦的闭塞呈充盈缺损或再通后的模糊影,病变部位和范围与MRI相对应?熏 侧枝血管形成,深部静脉明显扩张或其他引流静脉显现。结论:MRI和MRV能准确诊断脑静脉窦血栓形成,而且可以用于病例的随诊观察。

Cerebral venous sinus thrombosis: diagnostic findings of MRI

Objective: To study the characteristic features of MRI in cerebral venous sinus thrombosis. Methods and Methods: A retrospective review of 13 patients with cerebral venous sinus thrombosis was made from December 2003 to January 2005. MR examination was performed on 1.5T superconductive scanner in multiple planes. MR venography were acquired by using techniques of 2D-TOF. Results: MRI showed disappearance of the normal flow void signal of the cerebral venous sinus, abnormal high signal intensities were found instead. The superior sagittal sinus and transverse sinus were most frequently involved. MR venography demonstrated filling defect and no flow void signal, stenosis or a recanalized sinus in these involved venous sinus. Collateral circulation became prominent, flow signal from deeper vein were seen, or emissary vein were visualized. Conclusion: MRI and MRV can be used for diagnosing and follow-up study in cerebral venous sinus thrombosis.