脑梗死患者磁共振液体反转恢复序列成像高信号血管征的意义

Significance of hyperintense vessel signs on fluid-attenuated inversion recovery magnetic resonance imaging in patients with cerebral infarction

目的探讨脑梗死患者磁共振液体反转恢复序列（FLAIR）成像高信号血管征（HVS）的意义。方法对我院住院脑梗死患者共262例的磁共振FLAIR成像中的HVS进行识别与分析，并与磁共振血管成像（MRA）和数字减影血管造影（DWI）所见进行对比。结果共发现HVS119例（45．4％），其中发病〈24h者47例（47／56，83．9％），且显著高于发病1～7d（61／151，40．4％）和7d后（11／55，20．0％）者（X2：49．371，均P〈0．01）。HVS位于大脑外侧裂74例（62．2％），皮质沟回11例（9．2％，11／119），后循环34例（28．6％，34／119）。HVS分布与MRA和DWI对比表明，在血管病变和缺血性病灶有比较好的对应。结论磁共振FLAIR成像的HVS有助于脑梗死患者血管病变的评估。

Objective To elucidate significance of hyperintense vessel signs（HVS） on FLAIR MRI in patients with cerebral infarction. Methods Two hundred and sixty-two patients with cerebral infarction admitted in our hospital were included in this study. We retrospectively defined HVS on FLAIR MRI in these patients in comparison with time of flight （TOF） on MR angiograms （ MRA）, hyperintense lesions on diffusion-weighted images （DWI）. Results HVS on FLAIR MRI were identified in 117 patients with cerebral infarction （45.4%）, of which 47 patients （ 83.9% ） were obtained within 24 hours of symptom onset. HVS on FLAIR MRI were detected in 74 patients at sylvian fissure （62. 2% ）, 11 at cortical sulci （9. 2%, 11/119） ,34 at the posterior circulation regions （28.6%, 34/119）. HVS on FLAIR MRI coincided well with ischemia of TOF on MRA and lesion patterns on DWI （2 test, P 〈 0. 01, respectively）. Conclusion HVS on FLAIR MRI is helpful to evaluate abnormal major cerebral arteries of patients with cerebral infarction.