脑出血核磁表现 急性脑梗死中弥散加权像和液体衰减反转恢复序列的诊断价值
中的应用价值。方法 120例急性脑梗死患者纳入研究,全部行常规T1WI、T2WI、FLAIR、DWI扫描,检查评价病变的显示度及检出率。结果 影像学对比发现FLAIR序列和DWI对病变的显示范围,均优于常规T1WI、T2WI,以DWI对病变显示更佳;在超急性期患者中,DWI序列的检出率为100.00%,显著高于FLAIR序列的23.81%(P<0.01),T1WI、T2WI序列未见检出;在急性期患者中,DWI序列、FLAIR序列的检出率均为100.00%,均显著高于T1WI、T2WI序列的79.48%(P<0.01)。结论 在超急性期,DWI序列具有高敏感性;急性期则DWI和FLAIR序列的敏感性均较高,两者联合使用,可准确可靠地诊断早期脑梗死。
【关键词】 脑梗死;DWI序列;FLAIR 序列;诊断
文章编号:1003-1383(2012)04-0469-02
中图分类号:R 743.33;R 445.2 文献标识码:A
doi:10.3969/j.issn.1003-1383.2012.04.006
The diagnostic value of DWI and FLAIR sequences in acute cerebral infarction
LU Wanxing1,LI Baosheng2,LAN Jingsheng3,MENG Lanqing1
(1.Department of Neurology;2.Department of Radiology;3.Department of Cardiovascular;Affiliated Hospital of Youjiang Medical University for Nationalities,Baise 533000,Guangxi)
【Abstract】 Objective To investigate the application value of DWI and FLAIR sequences in the diagnosis of acute cerebral infarction.
Methods 120 cases with acute cerebral infarction were scanned by conventional MRI T1WI,T2WI,FLAIR,DWI.The visibility of lesions and the detection rates were reviewed and evaluated.
Results The imaging comparison indicated that the lesion range FLAIR and DWI displayed was better than that T1WI ,T2WI, and DWI lesions showed.For patients with super-acute infarction,the detection rate of DWI was 100%,which was higher than that of FLAIR,23.81%.T1WI and T2WI were not able to detect the lesions.For patients with acute infarction the detection rates of DWI and FLAIR were both 100.00%,while those of T1WI,T2WI were all 79.48%.
Conclusion DWI sequences have high sensitivity for detecting super-acute cerebral infarction.DWI and FLAIR sequences can be used in combination for detecting acute cerebral infarction because they can provide accurate and reliable diagnosis of early cerebral infarction.
【Key words】 cerebral infarction;DWI sequences;FLAIR sequences;diagnosis
随着医疗技术的不断进步,弥散加权像(DWI)作为急性脑缺血的诊断及评价工具[1],已渐趋应用于早期缺血性脑血管疾病的诊断之中;液体衰减反转恢复( FLAIR)序列则可通过对脑脊液的抑制,改善病变与正常组织间的对比,近来已广泛用于中枢神经系统疾病如急性脑梗死的诊断[2],两者结合应用,是否对急性脑梗死的诊断敏感性更强?相关报道较少。
资料与方法
1.一般资料 2010年4月~2011年4月收治120例急性脑梗死患者,均符合第四届全国脑血管病会议制定的诊断标准[3]。男68例,女52例;年龄最小者45岁,最大者72岁,平均(59.5±1.9)岁;职业:脑力劳动66例,体力劳动54例;发病时间:42例在6 h以内(超急性期),78例6~24 h发病(急性期)。
2.纳入与排除标准 纳入标准:①符合诊断标准;②年龄:45~75岁;③经头部CT或MRI证实脑梗死者且均有颈内动脉、椎基底动脉系统缺血症状;④发病时间:0~24 h;⑤患者知情同意。排除标准:①溶栓治疗后的脑梗死患者以及脑出血手术后的患者;②有药物滥用及酒精依赖史;③有严重的自杀企图及行为;④入组后依从性差,中途退出者。
3.检测方法[4] 采用超导型高场磁共振成像系统(SIEMENS 1.5T,MAGNETOM_ESSENZA)进
