简介:Diffuseaxonalinjury(DAI)isaxonalandsmallvesselinjuryproducedbyasuddenaccelerationoftheheadbyanexternalforce,andisamajorcauseofdeathandseveredisability(Paterakisetal.,2000).Prognosisispoorerinpatientswithapparenthemorrhagethaninthosewithout(Paterakisetal.,2000).Therefore,itisimportanttoidentifythepresenceandprecisepositionofhemorrhagicfociforamoreaccuratediagnosis.CTandmagneticresonanceimaging(MRI)havelongbeenappliedinthediagnosis