扩散加权成像在超急性、急性脑梗死中的诊断价值  

The Value of Diffusion-Weighted Imaging in the Diagnosis of Sub-Acute and Acute Brain Infarction

作　　者：卢敬红[1] 张蕊[1] 裴茁[1] 王静秋[1] 倪海洋[1] 李丽[1] 

机构地区：[1]黑龙江省齐齐哈尔第一医院,黑龙江齐齐哈尔160001

出　　处：《北京生物医学工程》2010年第2期140-142,共3页Beijing Biomedical Engineering

摘　　要：目的 通过与T2加权成像（T2-weighted imaging,T2WI）、T1加权成像（T1-weighted imaging,T1WI）进行比较,探讨磁共振扩散加权成像（diffusion weighted imaging,DWI）及表观扩散系数（apparent diffusion coeffecient,ADC）在超急性、急性脑梗死诊断中的应用价值.材料与方法应用单次激发SE EPI（echoplanar imaging）序列进行DWI扫描和常规MR扫描,对临床40例脑梗死患者进行检查,观察病灶在DWI上的信号特点并测定病灶的ADC值.结论 40例病例中超急性期（0～6h）脑梗死6例、急性期（7～24h）脑梗死34例均在DWI上呈高信号,在ADC图上呈低信号,平均ADC值为（0.689±1.04）×10^-3mm^2/s.结论 DWI及ADC对急性、超急性脑梗死的诊断较常规MR更早、更准确,尤其是对超急性脑诊断,而且能准确反应出缺血半暗带的相应病理生理变化.Objective To evaluate the applications of DWI and ADC in the diagnosis of sub-acute and acute brain infarction, being compared with T2WI and T1WI. Methods Using SE-EPI sequence to complete DWI and normal MR imaging,we analyzed the signal charactericity and ADC values in 40 patients. Results Six cases in sub-acute（0 -6h） cerebral infarction and 34 cases in acute（7 -24h） eercbral infaretion were showed high signal in DWI,and showed low signal in ADC map. The mean ADC value was （0. 689 ± 1.04）× 10^ -3mm^2/ s（X ± S）. Conclusion The sub-acute and acute cerebral infarction patients were dliagnosed earlier, more accurately by DWI and ADC value than conventional MR,especially in the sub-acute brain infarction cases. At the same time,DWI can also show the pathological varities in the ischemic penumbra.

关 键 词：脑梗死 扩散加权成像 表观扩散系数 

分 类 号：R318.04[医药卫生—生物医学工程]