目的 分析急性脑梗死患者MRI 高信号血管征(HVS)与颈内动脉狭窄程度 的相关性。方法 选择我院2015年11月至 2017年10月收治的急性脑梗死患者277 例，所有患者均进行头颈联合CTA检查， 根据检查结果将患者分为颈内动脉狭窄组 和颈内动脉无狭窄组，两组患者均行头 颅MRI检查，比较两组HVS阳性率。将颈 内动脉狭窄组狭窄程度分为不同等级， 采用Spearman相关分析HVS阳性率和HVS 等级与颈内动脉狭窄程度的相关性。结 果 颈内动脉狭窄组(n=103)HVS阳性率为 52.43%，颈内动脉无狭窄组(n=174)HVS 阳性率为20.11%，两组HVS阳性率比较差 异有统计学意义(χ2 =30.978，P<0.05)； HVS阳性率与颈内动脉狭窄程度呈正相 关(r=0.826，P<0.05)；HVS II级率与 颈内动脉狭窄程度呈正相关(r=0.793， P<0.05)。结论 急性脑梗死患者MRI HVS 阳性率和HVS II级率与颈内动脉狭窄程度 呈正相关，HVS可有效评估颈内动脉狭窄 程度。

Objective To analyze the correlation between MRI high-signal vascular signs (HVS) and degree of internal carotid artery stenosis in patients with acute cerebral infarction (ACI). Methods A total of 277 cases of ACI patients admitted to our hospital from November 2015 to October 2017 were selected and were examined by CTA of intracranial and cervical arteries. According to the results of examination, the patients were divided into the internal carotid artery stenosis group and the non internal carotid artery stenosis group, and they were given cranial MRI examination, and the positive rate of HVS was compared between the two groups. The stenosis degree of the internal carotid artery stenosis group was divided into different grades. The correlation between HVS positive rate, HVS grade and degree of internal carotid artery stenosis was analyzed by Spearman correlation analysis. Results The positive rate of HVS was 52.43% in the internal carotid artery stenosis group (n=103) and 20.11% in the non internal carotid artery stenosis group (n=174), and the positive rate of HVS in the two groups was significantly different (χ2 =30.978, P<0.05). The HVS positive rate was positively correlated with the degree of internal carotid artery stenosis (r=0.826, P<0.05). The HVS II rate was positively correlated with the degree of internal carotid artery stenosis (r=0.793, P<0.05). Conclusion The MRI HVS positive rate and HVS II rate in ACI patients are positively correlated with the degree of internal carotid artery stenosis, and HVS can evaluate the degree of internal carotid artery stenosis effectively.