Objective To investigate the diagnostic value of diffusion weighted imaging of MRI (DWI) to the acute cerebral infarction. Methods Routine MRI (T1 flair, T2WI and T2flair) and DWI examination were performed on 26 patients with acute cerebral infarction (disease onset ＜6 h 4 cases, 6 -24 h 14 cases, 1 -7 d 8 cases). And the apparent diffusion coefficient (ADC) map was calculated by computer. Results Four patients with onset ＜ 6 h were found nothing abnormal signals by routine MRI, but were found high signals by DWI and Iow signals by ADC.Twenty-two patients with onset 6 h -7 d were found high or little high signals by MRI T2WI, low or little low signals by T1 flair, high signals by DWI and low signals by ADC. Conclusions The lesions of acute cerebral infarction can be showed by DWI at super early stage. And the diagnostic value of DWI to acute cerebral infarction is very important.%目的:探讨磁共振弥散加权成像(DWI)对急性脑梗死的诊断价值.方法:对26例急性脑梗死患者(发病＜6h4例、6-24h14例、1-7d8例)进行常规MRI(T,flair,T2WI,T2flair)检查以及DWI检查,并由计算机算出表观扩散系数(ADC)图.结果:发病＜6h的4例患者常规MRI未见异常;DWI均出现高信号;ADC均为低信号.发病6h-7d的22例患者MRI T2 WI均为高/稍高信号,T1 flair均为低/稍低信号;DWI均为高信号;ADC均为低信号.结论:DWI能在超早期显示急性脑梗死的病灶,对急性脑梗死有着非常重要的诊断价值.
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