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目的：研究ＭＲ血管造影（ＭＲＡ）在蛛网膜下腔出血（ＳＡＨ）患者病因诊断中的应用准确性和可靠性。材料和方法：回顾性分析３３例ＳＡＨ患者的ＭＲＡ资料，并与ＤＳＡ作了对比分析，ＭＲＡ采用三维时间流逝（３Ｄ－ＴＯＦ）法。结果：ＭＲＡ上显示了２６例血管病变中的２２例，包括１５个动脉瘤中的１３个，８例动静脉畸形中的６例和３例血管狭窄闭塞性病变。１个完全血栓形成的右颈内动脉瘤ＭＲＡ上未显示。但常规ＭＲＩ和ＭＲＡ原始图像上显示，ＭＲＡ结合ＭＲＩ和ＭＲＡ原始图像可以对９１％的患者做出正确诊断和评价，动脉瘤和周围血管的关系及ＡＶＭ的供血动脉和畸形结节能在ＭＲＡ上被准确评价。结论：作为一种非损伤性的血管成像方法，ＭＲＡ具有安全、可靠和方便的优点，可以做为常规用于ＳＡＨ患者的筛选检查。
Objective: To study the accuracy and reliability of MR angiography (MRA) in the etiological diagnosis of patients with subarachnoid hemorrhage (SAH). Materials and Methods: MRA data of 33 patients with SAH were retrospectively analyzed and compared with DSA. MRA was performed by 3D-TOF. RESULTS: Twenty-two of the 26 vascular lesions were shown on the MRA, including 13 of 15 aneurysms, 6 of 8 arteriovenous malformations, and 3 of 3 vascular occlusive lesions. One fully thrombosed right internal carotid aneurysm was not shown on MRA. However, the conventional MRI and MRA original images showed that MRA combined with MRA and MRA original images could correctly diagnose and evaluate 91% of patients, the relationship between aneurysms and peripheral blood vessels and the feeding arteries and abnormal nodules of AVM in MRA Accurate evaluation. Conclusion: As a noninvasive vascular imaging method, MRA is safe, reliable and convenient. It can be used as a routine screening test for patients with SAH.