蛛网膜下腔出血(SAH)是临床常见的颅内出血,临床表现为蛛网膜下腔出血三联征:头痛呕吐、脑膜刺激征及血性脑脊液等。该病起病急,进展快,常反复发作,病死率约为25%。CT是目前诊断急性SAH的首选检查方法[1,2],缺点是容易产生假阴性或假阳性结果。磁共振成像快速液体衰减反转恢复( Subarachnoid hemorrhage (SAH) is a common clinical intracranial hemorrhage, clinical manifestations of triple syndroneous subarachnoid hemorrhage: headache and vomiting, meningeal irritation and bloody cerebrospinal fluid. The disease onset, rapid progress, often repeated attacks, the fatality rate of about 25%. CT is the preferred method of diagnosis of acute SAH [1,2], the disadvantage is prone to false negative or false positive results. Magnetic Resonance Imaging Fast Liquid Attenuation Reverse Recovery (