MRI在脑脓肿诊断中的应用价值

目的:探讨MRI在诊断脑脓肿中的价值。方法:对临床、手术和病理证实的35例脑脓肿分别进行常规MRI平扫、增强、T2FLAIR和弥散加权成像(DWI)检查。结果:35例脑脓肿共45个病灶,其中15个病灶在T1WI上出现"暗线"征,19个病灶在T2WI上出现"暗带"征,19个病灶在T2FLAIR上出现"亮带"征;19个病灶DWI上呈程度不等的高信号,ADC值低,6个病灶呈等、低信号,ADC值增高;45个病灶脓肿壁均强化明显,显示脓腔、脓肿壁及水肿带征象。结论:"暗带"征和ADC值对脑脓肿的MRI诊断有一定价值,对脑脓肿的MRI检查,DWI应纳入常规。

The Aplication Value of MRI to the Brain Abscess Diagnosis

Objective：To discuss the application value of MRI to the brain abscess diagnosis.Methods： 35 cases with the brain abscess,which were verified through clinical,surgical,or pathological diagnosis,were examined through conventional plain scanning,enhancement,FLAIR and DWI,respectively.Results： 45 lesions were found on the 35 cases with brain abscess.Among the 45 lesions,15 displayed the dark line sign on T1W1,19 the shade sign on T2WI,15 the bright band sign on FLAIR;19 lesions displayed hyperintense signal to variable degrees on DWI with low value of ADC,and six hypointense or isointense signal on DWI with high value of ADC;45 lesions had obvious enhancement in the abscess wall and showed a abscess cavity,abscess wall,and edema zone.Conclusions：The dark line sign and ADC value are valuable for MRI diagnosis of brain abscess.DWI should be incorporated into routine examination.