T2＊WI磁共振成像技术在急性脑梗死出血性转化中的应用  

Clinical application of MR T2＊WI in hemorrhagic transformation after acute cerebral infarction

作　　者：黄波涛[1] 金新安[1] 张煜[2] 陈小聪[1] 陈伟[1] 区俊兴[1] 

机构地区：[1]广东医学院附属东莞厚街医院放射科,广东东莞523945 [2]广东医学院附属东莞厚街医院内科,广东东莞523945

出　　处：《实用放射学杂志》2011年第12期1804-1806,1822,共4页Journal of Practical Radiology

摘　　要：目的 探讨T2＊WI磁共振成像技术在急性脑梗死出血性转化（HT）中的临床应用价值.方法 对82例急性脑梗死患者行常规MR序列（包括T1WI、T2WI、T2-FLAIR、DWI）和T2＊WI检查.根据梗死横断位最大层面面积＞3.0 cm2、1.5-3.0 cm2之间、＜1.5 cm2分为大梗死组、小梗死组和腔隙性梗死组.对常规MR序列与T2＊WI在各组患者HT的检出率进行统计学分析.结果 82例急性脑梗死患者中,大梗死组32例,小梗死组28例,腔隙性梗死组22例.T2＊WI共检出HT 22例,其中大梗死组中18例,小梗死组中4例,腔隙性梗死组中未检出.对大梗死组与小梗死组HT的发病率进行χ2检验,差异有统计学意义（χ2=4.5,P〈0.05）;22例HT中T2＊WI共检出52个出血灶,而常规序列检出其中11例共29个出血灶.其中大梗死组中T2＊WI 检出40个病灶,常规序列检出其中10例27个病灶;小梗死组中T2＊WI检出 12个病灶,常规序列检出其中1例2个病灶.将以上2种方法对HT病灶的检测率进行统计学分析,采用精确概率法计算,差异具有统计学意义（P＜0.05）.结论 T2＊WI诊断急性脑梗死HT比常规序列具有更高的敏感性,对指导临床治疗有重要价值.Objective To study the clinical value of T2 ^＊ WI in the detection of hemorrhagic transformation（HT） after acute cerebral infarction（ACI）. Methods 82 patients with ACI were examined with conventional MR imaging sequence（including T1 WI, T2WI,T2-FLAIR and DWI ）and T2 ^＊ WI. 82 patients were devided into three groups based on the infarction dimensions,group A 〉 3.0 cm2,group B（1.5-3.0 cm2 ）and group C（cavity infarction）. The areas of the maximum infarction slice were measured. The detecting rates of HT with conventional MR imaging and T2 ^＊ WI were analysed statistically between three groups. Results Among all 82 patients,32 cases in group A,28 in group B and 22 in group C were found. 22 cases with HT were showed by T2 ＊ WI, among of which 18 cases were group A,4 in group B and zero in group C. The incidence of HT between group A and B were of difference statistically（x^2 =4.5,P〈0.05）. 52 and 29 foci in 22 cases and 11 cases with HT were detected by T2^＊ WI and by conventional MR imaging, rcspectivehy, of which, 40 and 27 foei in group A, 12 and 2 foci in group 13 were detected by T2 ＊ WI and conventional sequence, respectively, there were significant differences statistically between them（P〈0.05）. Conclusion T2 ^＊ WI has higher sensitivity than conventional sequence in diagnosis of HT after ACI,which is valuable in the guidence of clinical treatment.

关 键 词：磁共振成像 脑梗死 脑出血 脑 

分 类 号：R445.2[医药卫生—影像医学与核医学] R743.33[医药卫生—诊断学]