FLAIR序列大脑中动脉高信号征在急性期脑梗死诊断中的价值

The Value of the Hyperintense Sign of Middle Cerebral Artery in the Diagnosis of Acute Cerebral Ischemia

目的探讨FLAIR序列大脑中动脉高信号征在急性期脑梗死中的诊断价值。方法对2011年2月至2012年10月大脑中动脉供血区急性脑梗死35例进行常规MRI检查及MRA检查,并随机选择同期非大脑中动脉供血区急性脑梗死62例作为对照组;观察各自FLAIR序列大脑中动脉高信号征的发生率、位置及形态学特征。结果大脑中动脉供血区急性脑梗死35例患者13例(37.1%)发现FLAIR序列大脑中动脉高信号征,而对照组只有6例(9.68%)发现大脑中动脉高信号征,差异有统计学意义(=10.714,P<0.005)。13例HSMCA患者中,8例(61.5%)相应大脑中动脉有严重狭窄或闭塞,22例无HSMCA患者,6例(27.3%)有严重狭窄或闭塞,差异有统计学意义(=3.998,P<0.05)。结论 FLAIR序列大脑中动脉高信号征可作为急性期脑梗死的早期参考征象,有一定的诊断价值。

Objective To explore the value of the hyperintense sign of middle cerebral artery（HSMCA） in the diagnosis of acute cerebral ischemia.Methods During February 2011 to October 2012,35 patients of acute cerebral ischemia were studied,of which 62 patients without acute cerebral ischemia were randomly selected.The incidence rate,location,and morphology were observed.Results HSMCA were detected on FLAIR images in 13（37.1%） patients of with acute cerebral ischemia,compared with 6（9.68%） patients of without acute cerebral ischemia.There was significant difference（= 10.714,P〈0.005） between them.In 13 patients with HSMCA,8 cases（61.5%） had severe stenosis or occlusion in corresponding segements of MCA;In 22 patients without HSMCA,6 cases（27.3%） were observed.There was significant difference（= 3.998,P〈0.05）.ConclusionHSMCA on FLAIR images could be an early sign and was valuable in the diagnosis of acute cerebral ischemia.