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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  张蕊  裴茁  王静秋  倪海洋  李丽 
单位:黑龙江省齐齐哈尔第一医院(黑龙江齐齐哈尔160001)
关键词: 脑梗死;扩散加权成像;表观扩散系数 
分类号:
出版年·卷·期(页码):2010·29·2(140-142)
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。结果 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)×10-3mm2/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) cercbral infaretion were showed high signal in DWI,and showed low signal in ADC map. The mean ADC value was (0.689±1.04)×10-3mm2/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.

参考文献:

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