短暂性脑缺血发作的颈动脉超声和影像学表现及评价

目的评价颈动脉超声、磁共振（MRI）、磁共振血管造影（MRA）及数字减影血管造影（DSA）对短暂性脑缺血发作（TIA）的诊断价值。方法90例颈动脉及椎基底动脉TIA患者分别进行CT、MRI、MRA、颈动脉超声及DSA检查。结果15例（16.7％）TIA患者CT、MRI显示有小血管腔隙性梗死，20例（22.2％）CT正常，MRI的他加权像显示有小的梗死灶，60例患者行颈动脉超声检查，40例（66.7％）显示有动脉硬化及管腔狭窄。有30例行MRA及DSA检查，14例（46.7％）MRA有异常，22例（73.3％）DSA显示颈动脉和相应动脉的狭窄或闭塞。结论CT及MRI是诊断TLA的筛选手段，颈动脉超声、MRA及DSA对TIA的诊断及预后的估计具有重要意义。

Evaluation of carotid artery duplex ultrasonography and imaging manifestation in patients with transient ischeraic attacks

Objective To evaluate the diagnostic value of carotid artery duplex ultrasonography, MRI, MRA and digital subtraction angiography （DSA） in patients with transient ischemic attacks （TIA）. Methods In 90 patients with TIA, internal carotid artery and vertebral - basilar artery system were examined with CT, MRI, MRA, DSA and carotid artery duplex ultrasonography. Results 15 （ 16.7% ） patients with TIA showed lacunar infarction on CT scanning and MRI, 20（22%） of them showed small cerebral infarction on T2WI which could not be showed by CT scanning. Sixty of them were also examined by carotid artery duplex ultrasonography. Forty （66.7%） patients showed atherosclerosis. Thirty of them were also examined with MRA and DSA, fourteen （46.7%） patients showed abnormal MRA, 22 （73.3%） patients showed carotid artery and relevant cerebral artery stenosis or occlusion on DSA. Conclusion CT scanning and MRI are screening methods for diagnosis of TIA, and carotid artery ultrasanogrphy, MRA and DSA have important significance in diagnosis and prognosis of TIA .