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目的 探讨TCD和MRI在颈内动脉系统TIA中的诊断价值。方法 对 66例颈内动脉系统TIA患者的临床与TCD及MRI的结果作对比分析 ,采用 χ2 检验。结果 发现颈内动脉系统TIA患者发作间期 60例 ( 90 9%)脑内动脉存在着广泛的血流动力学改变 ,2 4例 ( 4 2 4%)症状相应侧动脉均有不同程度的狭窄 ,头颅MRI检查发现 5 0例 ( 75 8%)有梗塞灶 ,3 5例 ( 5 3 5 %)有脑白质疏松症 ,病灶多呈双侧分布 ,较对称 ,症状与病灶无明显相关性。MRI有无梗塞灶与TCD阳性率无明显差异性 (P >0 0 5 ) ,MRI有无梗塞灶的症状相应侧动脉狭窄改变情况亦无显著性差异 ( P >0 0 5 )。结论 TCD能了解颈内动脉系统TIA患者血管情况 ,可作为常规和初筛检查。脑MRI对颈内动脉系统TIA可能无特别临床意义 ,但对TIA临床亚型 -内囊警示综合征有定位诊断意义
Objective To investigate the diagnostic value of TCD and MRI in TIA of internal carotid artery. Methods 66 cases of internal carotid artery TIA patients with clinical and TCD and MRI results for comparative analysis using χ2 test. The results showed that there were extensive hemodynamic changes in 60 cases (90.9%) of intracerebral arteries in TIA patients with internal carotid artery system. In 24 cases (42.4%), the corresponding side arteries had different degrees of stenosis In the head MRI examination, 50 cases (75.8%) had infarction and 35 cases (535%) had leukoaraiosis. The lesions were mostly bilateral and symmetrical. There was no significant correlation between the symptoms and the lesion. There was no significant difference in MRI with or without infarction and TCD positive rate (P> 0.05). There was no significant difference in MRI with or without infarction (P> 0.05). Conclusion TCD can understand the internal carotid artery TIA blood vessels, can be used as a routine and screening tests. MRI of the internal carotid artery TIA may not have special clinical significance, but the clinical subtypes of TIA - internal capsule warning syndrome positioning diagnostic significance