Objective:To study the clinical application value of the fluid attenuated inversion recovery(FLAIR),diffusion weighted imaging(DWI)can joint magnetic sensitive weighted imaging(SWI)sequence in subarachnoid hemorrhage(SAH). Methods:All 35 patients with SAH,including acute or acute stage(19 cases),subacute phase of 10 cases,6 cases of chronic phase. Computed tomography(CT),magnetic resonance(MR)in conventional sequence(T1WI,T2WI)and FLAIR and DWI and SWI sequence can check,observation of the imaging appearances SAH,comparing the check method of display of the SAH and its causes and complications. Results:SAH on FLAIR and DWI sequence can show high signal,has low signal on SWI se-quence. Routine MRI sequence for each period of SAH detection rate is low. Computed tomography(CT)in puper acute and subacute or acute SAH and SAH detection rate were 73. 7% and 50. 0% respectively. And FLAIR and DWI joint can SWI se-quence SAH detection rate is 100% of each period,combined with routine MRI sequences show SAH cerebral contusion or dif-fuse axonal injury(DAI),17 cases,1 case of cerebral ischemia or infarction,displays the aneurysm in spontaneous SAH and vascular malformation in 2 cases,statistically significant difference(P < 0. 05). Conclusion:FLAIR and DWI joint can SWI se-quence the highest sensitivity and accuracy for diagnosing SAH,and be able to better display its causes and complications,for clinical diagnosis,staging,and provide a scientific basis for condition evaluation and prognosis.%目的：探讨液体衰减反转恢复（FLAIR）、弥散加权成像（DWI）联合磁敏感加权成像（SWI）序列在蛛网膜下腔出血（SAH）中的临床应用价值。方法：35例 SAH 患者，包括超急性或急性期19例，亚急性期10例，慢性期6例。均行 CT、磁共振常规序列（T1WI，T2WI）及 FLAIR，DWI 和 SWI 序列检查，观察 SAH 的影像学表现，比较各检查方法对各时期 SAH 及其病因和并发症的显示情况。结果：SAH 在 FLAIR，DWI 序列上显示为高信号，在 SWI 序列上呈低信号；MRI 常规序列对各时期 SAH 检出率较低；CT 在超急性或急性 SAH 和亚急性期 SAH 的检出率分别为73.7％和50.0％；而 FLAIR，DWI 联合 SWI 序列对各时期 SAH 检出率均为100％。结合 MRI 常规序列显示 SAH 合并脑挫裂伤或弥漫性轴索损伤（DAI）17例，脑缺血或梗死1例，在自发性 SAH 中显示动脉瘤和血管畸形各2例，差异具有统计学意义（P ＜0.05）。结论：FLAIR，DWI 联合 SWI 序列对诊断 SAH 敏感性及准确性最高，并能够较好地显示其病因和并发症，为临床诊治、分期、病情评估及预后提供科学依据。
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