MRA、MRI、TCD对椎—基动脉改变对比研究

Comparative Study of MRA, MRI, TCD Results on V-BA Changes

观察经颅多普勒(TCD)对椎基动脉病变诊断的可靠性。方法:Ⅰ组13例应用MRI确诊之脑干梗塞病人。Ⅱ组42例有临床改变;如眩晕,走路不稳,眼颤等,TCD检查有异常改变者,则同时进行MRI和MRA检查。两组患者皆无意识障碍。结果:Ⅰ组13例MRI皆有脑干,小脑异常改变(其中4例为幕上基底节梗塞),TCD有V—BAvm下降或上升,仅一例RPICA消失。TCD异常率100%。Ⅱ组:42例MRA异常者30例,正常者12例,而MRI仅4例正常,异常者38例(其中17例基底节梗塞)而TCD为100%异常。结论:MRI异常者占92.72%,正常者4例,而MRA由于检查时间其异常者为71.43%12例正常,但TCD检查为100%异常。所以MRI,MRA,TCD相辅配合,可起到相辅相成的作用。

Observation on the reliability of TCD results over V - BA disease diagnosis. Method. Group 1 : 13 patients with MRI confirmed brainstem infarction. Group Ⅱ : 42 patients with clinical changes such as vertigo, walking unsteadily, nystagtmus, etc. MRI and MR A tests were carried out on those whose TCD results were abnormal. All patients of the two groups had no disturbance of consciousness. Result. Group Ⅰ : all of the 13 cases had abnormal MRI changes in the brainstem and/ or cerebellar (4 of them had supratentorial basal ganglion infarction). TCD changes were shown as the increase or decrease of theⅤ -BA Vm. Only in one case RPI CA disappeared. Abnormal positive rate of TCD was 100%. Group Ⅱ : among 42 cases, 30 abnormal and 12 normal in MRA examination. Yet in MRI examination, 4 normal, 38 abnormal (in 17 of them, basal ganglion infarction were found). TCD results were 100% normal. Conclusions. In MRI examination, 92. 72% of the cases were abnormal, 4 cases normal. Yet in MRA examination, because of the examination period, 71. 43% abnormal; 12 cases normal; in TCD examination, 100% abnormal. Therefore, the coordination of MRI, MRA and TCD might supplement each other.