【摘要】 目的探讨弥散加权成像(Diffusionweightedimaging,DWI)对超急性脑梗塞的诊断价值。方法19例超急性脑梗塞患者均行液体衰减反转恢复序列的T1像(T1FLAIR)、T2像(T2FLAIR)、T2加权像(T2WI)、及弥散加权像(DWI)检查。比较各种检查方法对病灶的检出率。结果①DWI对病灶的检出率和敏感性均明显高于T1FLAIR、T2WI、T2FLAIR(P均<0.05);②所有病灶的DWI表观弥散系数(apparentdiffusioncoefficient,ADC)值均有不同程度下降,平均下降64.3%(35%～87%)。结论DWI对超急性脑梗塞的诊断敏感性高,能准确、可靠地判断病灶的大小及部位,对诊断超急性脑梗塞有重要价值。更多还原

【Abstract】 Objective:To study the diagnostic value of diffusion-weighted imaging（DWI）in super acute stage brain infarction.Methods:Nineteen cases of super acute stage brain infarction were examined by MRI.The sequences included T₁FLAIR （T₁ fluid-attenuated inversion recovery）,T₂WI（T₂ weighted imaging）,T₂FLAIR and DWI（diffusion-weighted imaging）.The rates of lesions displayed were compared between every sequence.Results:①The sensitivity and display rate on DWI was higher than T₁FLAIR,T₂FLAIR and T₂WI.②The value of ADC of the lesions decreased in all cases.The average was 64.3% （from 35% to 87%）.Conclusion:DWI is more sensitive than other sequences;the size and position of lesions can be delayed on DWI accurately and reliably.There is important value of DWI in diagnosis of super acute brain infarction.更多还原