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ID:5415411
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时间:2017-12-10
《脑后部可逆性脑病综合征的mri及dwi特点》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据828墼塾堂壅壁!!!!至!旦星丝鲞星!塑曼!!!!!旦翌生堡!垒!g!!!!!∑!!!!:型!:!●脑后部可逆性脑病综合征的MRI及DWI特点中枢神经影像学王志群,李坤成,武力勇,赵澄.【摘要】目的:49讨脑后部可逆性脑病综合征(PRES)的MRI及扩散加权成像(DWI)特点。方法:回顾性分析3例临床诊断为PRES患者的临床资料,患者均表现为头痛、视物不清,并伴有高血压。所有患者均行常规生化、脑脊液、血及尿常规检查,行常规MRI、MRA及DWI扫描。结果:3例PRES患者MRI示双侧顶枕区
2、皮质及皮层下白质多发病灶,在T.wl上病灶呈等信号或略低信号,FLAIR及T2Wl上呈高信号,DWI显示部分病灶呈等信号或低信号,表现弥散系数图(ADC)上呈高信号,部分病灶DWI上呈高信号,ADC上呈等信号。治疗后随访MRI显示所有患者病灶逐渐减小、消失。结论:PRES好发于顶枕叶皮质及皮层下白质.病变早期为血管源性水肿,晚期可表现为细胞毒性水肿,治疗及时可逆转,采用MRI及DWI成像结合其临床特征可做出较为准确的诊断。【关键词】脑后部可逆性脑病综合征·磁共振成像;扩散加权成像【中图分类号】R44
3、5.2;R742【文献标识码】A【文章编号11000—0313(2009)08—0828—04MRIandDWIManifestationsintheDiagnosisofPosteriorReversibleEncephalopathySyndromeWANGZhi—qun,LIKun-cheng,WULi-yong,eta1.DepartmentofRadiology,theCapitalUniversityofMedicalScienceXuanwuHospital,Bering100053,
4、P.R.China[Abstract]0bjective:TostudytheMRIanddiffusionweightedimaging(DWI)featuresofposteriorreversibleen—cephalopathysyndrome(PRES).Methods:ThreecaseswithPRESwereconfirmedbyclinichistory,whichpresentedhead—ache.visualdisorderandhypertension.Theroutine
5、biochemicalexamination,cerebrospinalfluidexamination,bloodandurinroutineexaminationwereperformedforallthecases.ConventionalMRI,MRangiographyandDWlwereperformedforthethreepatients.Results:MRIrevealedmultiplelesionswhichwerelocatedinbilateralparietalando
6、ccipitallobes,involvinggreymatterandwhitematter.HyperintensityofthelesionswasrevealedonT2WIandFLAIRimages;isointensityormildhypointensityonT1WI.SomeoflesionsshowedisointensityorhypointensityonDWIandhyperintensityonapparentdiffu—sioncoefficient(ADC)maps
7、.Ontheotherhand,someOflesionsshowedhyperintensityonDWIandisointensityonADCmaps.Follow-upscansshoweddiminutionordisappearanceofthelesion.Conclusion:ThelesionsofPRESareusuallyIoca’tedinparietalandoccipitallobes,presentvasogenicedemaintheearlystageandthec
8、ytotoxicedemainthelatestage.Thelesionscanbereversiblebypropertreatment.WiththeapplicationofMRI,especiallyDWI,combinedwithclinicalmanifes—tations,thediagnosisofPREScabbemadedefinitely.[Keywords]Posteriorreversibleencephalopathysyndrome;M
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