摘要:目的探讨MRI弥散加权成像(difussion—weighted imaging,DWI)在诊断脑弥漫性轴索损伤(diffuse axonal in—iury,DAI)中的价值。方法回顾性分析16例经临床及影像学诊断为DAI患者的常规MRI和DWI的资料,分别比较DWI、T1加权像(T1 weightedimaging,TlwI)、T2加权像(T2 weighted imaging,T2WI)、液体衰减反转恢复(fluidat—tenuated inversion recovery,FLAIR)序列对DAI病灶的检出数目,并分析其分布特点和信号特征。结果DAI病灶主要分布在白质、皮髓交界区、基底节、胼胝体、脑干及小脑等区域。DWI对DAI病灶的检出率最高。与其它序列的差异有统计学意义(P〈0.05)。结论常规序列和DWI联合应用为临床DAI诊断提供可靠的影像学依据,应作为MRI检查DAI的常规和首选序列。
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