脑动脉瘤破裂的MR诊断(附20例分析)

目的:探讨MR成像对脑动脉瘤破裂的诊断价值。方法:回顾分析20例明确诊断的动脉瘤破裂MR检查资料。结果:常规MR对显示瘤体有限(15%),但结合出血分布特点及血管情况可提示诊断;MRA对显示破裂动脉瘤有较高特征性(90%)。特征性表现为:①形态不规则,边缘不光滑,有棘状突起。②信号不均,流空减弱。③血管痉挛。结论:MR对诊断动脉瘤破裂有一定特征性,可作为动脉瘤破裂诊断筛选,且与DSA互补。

OPERATIONS ON ANEURYSMS OF THE ANTERIOR COMMUNICATING ARTERY NOT VISUALIZED BY CEREBRAL ANGIOGRAPHY──REPORT OF FOUR CASES

Four cases of anterior communicating aneurysms are reported with clinical presentations of recurrent intracranial hemorrhage undisclosed in their cerebral angiography. Operative exploration revealed anterior communicating aneurysms in these patients. It is thought possible that these patients harbored aneurysms which failed to exhibit on angiograms due to temporary thrombosis or development of abnormal cerebral vessels. CT scanning was important for diagnosis of these patients.