摘要
目的:探讨3.0T高分辨磁共振(HR-MRI)成像技术在急性缺血性脑卒中(AIS)的应用及预后影响因素.方法:选取2019年1月至2022年6月海南省人民医院收治的92例AIS患者,均予以溶栓治疗,并在治疗后90 d依据改良Rankin量表(mRS)将其纳入预后良好组(66例,mRS评分≤2分)与预后不良组(26例,mRS评分＞2分).所有患者于入院1周内行Magnetom Trio型3.0T HR-MRI检查,对比管腔狭窄率、最狭窄处管腔面积、斑块负荷、T2加权成像(T2WI)信号强度指数、T1WI信号强度指数及斑块强化率参数变化;采用受试者工作特征(ROC)曲线,分析3.0T HR-MRI参数对AIS预后的预测价值;采用二元Logistic回归模型分析影响AIS患者预后的危险因素.结果:两组患者梗死灶直径比较,差异具有统计学意义(x2=6.574,P＜0.05).预后不良组患者最狭窄处管腔面积低于预后良好组,T2WI信号强度指数、T1WI信号强度指数及斑块强化率均高于预后良好组,两组比较差异有统计学意义(t=-3.378、4.443、4.413、3.890,P＜0.05).ROC曲线分析显示,T2WI信号强度指数、T1WI信号强度指数、最狭窄处管腔面积及斑块强化率预测AIS预后的ROC曲线下面积(AUC)值分别为0.743、0.739、0.706和0.748.Logistic回归分析显示,梗死灶直径＞3.0 cm、T1WI信号强度指数、T2WI信号强度指数、最狭窄处管腔面积及斑块强化率是影响AIS预后的独立危险因素(OR=3.889、257.151、105.073、4.091、1.121,P＜0.05).结论:3.0T HR-MRI在AIS患者预后评估中具有较高效能,能通过观察T2WI信号强度指数、T1WI信号强度指数、最狭窄处管腔面积、斑块强化率等参数变化,为预后判断及治疗方案制定提供指导,且上述参数是影响患者预后的危险因素,往往代表患者病情进展.
Abstract
Objective:To investigate the application of 3.0T high resolution magnetic resonance imaging(HR-MRI)in acute ischemic stroke(AIS)and the influence factors of prognosis.Methods:A total of 92 AIS patients who underwent treatment in Hainan General Hospital from January 2019 to June 2022 were selected as the research objects.All patients were treated by thrombolytic therapy,and they were divided into favorable prognosis group(mRS scores≤2 points,n=66)and poor prognosis group(mRS score>2 points,n=26)according to modified Rankin Scale after they received 90d treatment.All of patients underwent Magnetom Trio type of 3.0 T HR-MRI examination within 1 week after they hospitalized,and the changes of luminal stenosis rate,the luminal area at the narrowest point,the plaque load,T2WIsignal intensity index,T1WI signal intensity index,plaque enhancement rate and other parameters were compared.The receiver operating characteristics(ROC)curve was adopted to analyze the predictive value of 3.0T HR-MRI parameters on the AIS prognosis.Binary Logistic regression model was used to analyze the risk factors that affected the prognosis of AIS patients.Results:The difference of infarction diameter between two groups was statistically significant(x2=6.574,P<0.05).The lumen area at the narrowest point in the poor prognosis group was significantly lower than that in the favorable prognosis group,while the T2WI signal intensity index,T1WI signal intensity index and plaque enhancement rate in the poor prognosis group were significantly higher than those in the favorable prognosis group(t=-3.378,4.443,4.413,3.890,P<0.05),respectively.ROC curve analysis showed that the area under curve(AUC)values of T2WI signal intensity index,T1WI signal intensity index,lumen area at the narrowest point and plaque enhancement rate in predicting the AIS prognosis were respectively 0.743,0.739,0.706 and 0.748.The Logistic regression analysis showed that infarction diameter>3.0cm,T1WI signal intensity index,T2WI signal intensity index,lumen area at the narrowest point and plaque enhancement rate were respectively independent risk factors that could affect AIS prognosis(OR=3.889,257.151,105.073,4.091,1.121,P<0.05).Conclusion:3.0T HR-MRI has higher efficiency in the assessment for the prognosis of patients with AIS,which can provide guidance for the judgement of prognosis and the formulation of treatment scheme through observes the changes of a series of parameters include T2WI signal strength index,T1WI signal strength index,the lumen area at the narrowest point,plaque enhancement rate.The above parameters are risk factors that affect the prognosis of patients,which often represent the progress of patients'conditions.
国家科技期刊平台
NSTL
维普
万方数据