蛛网膜下腔出血患者的MRA和DSA的对照研究

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。

A Comparative Study of MR Angiography and Intra-arterial Digital Subtraction Angiography in Patients with Subarachnoid Haemorrhage

To evaluate the accuracy and reliability of magnetic resonance angiography (MRA)in diagnosing subarachnoid haemorrhage(SAH).Materials and Methods:33 patients undergone both digital subtraction angiography(IADSA) and MRA (using three dimensional time of flight method)were reviewed.Results:MRA showed 22 vascular lesions out of 26 cases, including 13 out of 15 aneurysms,6 out of 8 arteriovenous malformations(AVMs),and 3 intracranial arterial stenotic occlusive diseases,An aneurysm completely thrombosed was shown on conventional MRI and MRA imaging but not by TOF.Combined conventional MRI and MRA. with TOF MRA,91% patients could be diagnosed correctly and precisely.The relation of aneurysm with their parent vessels,the feeding arteries to AVMs and AVM nidus were precisely assessed on MRA Conclusion:As an noinvasive vascular imaging, MR angiography is a safe,reliable easy method could be taken routinely for screening patients with SAH.