Wernicke脑病典型MRI表现并复习文献

目的探讨Wernicke脑病的典型MRI表现。方法结合文献复习,分析13例Wernicke脑病的临床表现与MRI表现。结果 Wernicke脑病典型MRI表现为第三、四脑室旁、中脑导水管周围、乳头体、四叠体、丘脑内侧对称性异常信号,T1WI呈稍低信号,T2WI呈高信号,T2FLAIR呈高信号。结论 Wernicke脑病的MRI表现具有特征性,结合临床,往往能够得出正确诊断。     

新生儿胆红素脑病的MRI表现

目的 探讨磁共振成像(MRI)对新生儿胆红素脑病(NBE)诊断的价值.方法 回顾性分析28例胆红素脑病新生儿的常规MRI表现和临床资料.结果 28例患儿中27例T1WI苍白球对称性高信号.19例患儿底丘脑T1WI呈高信号,T2WI呈等信号,主要表现为底丘脑点状或"八"字形对称性短T1WI信号.8例患儿中脑、桥脑背侧、延髓T1WI呈高信号,而桥脑腹侧信号正常.扩散加权成像(DWI)显示所有胆红素脑病患儿的基底节无异常信号.结论 常规MRI及DWI有助于新生儿胆红素脑病的诊断.     

新生儿胆红素脑病脑损伤的MRI诊断价值

目的 :探讨新生儿胆红素脑病(NBE)脑损伤的MRI诊断及应用价值。方法 :回顾性分析45例NBE患儿头部MRI表现及临床资料。结果:45例中33例颅脑MRI表现为双侧苍白球区对称性T1WI高信号,17例T1WI高信号同时累及底丘脑或丘脑腹外侧;T2WI均呈等信号,T2FLAIR呈等或稍高信号;DWI均未见明显异常信号改变。12例1~3个月随访复查颅脑MRI,4例T2WI呈对称性稍高信号,临床上有脑损伤后遗症改变;8例颅脑MRI检查未见明显异常,临床上也未见明显神经异常症状。结论:新生儿NBE颅脑MRI苍白球区有特征性表现,即急性期为苍白球对称性T1WI高信号,慢性期为对称性T2WI稍高信号,可为临床早期诊断及预后判断提供帮助。     

胆红素脑病的MRI诊断

目的 探讨MRI对胆红素脑病的诊断和预后判断价值.方法 分析26例临床确诊为胆红素脑病患儿的MRI特点,MRI采用GE Signa EXCITE1.5T超导型磁共振扫描系统,扫描图像包括T1WI、T2WI和DWI,由2名放射科医师采用单盲法分析MR图像.结果 首次检查9例为新生儿,8例表现为双侧苍白球对称性T1WI高信号,5例伴丘脑腹外侧对称稍高信号;2例双侧苍白球对称性T2WI稍高信号.1个月以上随访的25例(25/26)均表现为双侧苍白球对称性T2WI高信号,4例T1WI呈低信号,1例T1WI呈稍高信号;25例DWI未见明显异常信号改变.1例3个月后 DWI呈高信号,而11个月时DWI高信号消失,所见双侧苍白球对称T2WI高信号也消失.结论 胆红素脑病患儿的MR影像具有特征性,可为临床早期诊断及预后判断提供重要信息.     

急性甲苯中毒性脑病的MRI表现

目的探讨急性甲苯中毒性脑病的MRI表现。方法回顾性分析本院临床确诊的6例急性甲苯中毒患者的临床资料和MRI表现。结果 6例患者首次头颅MRI均表现为两侧大脑半球白质广泛受累,同时累及两侧外囊、小脑齿状核、豆状核6例,累及丘脑1例。病灶T1WI呈低信号,T2WI呈较明显高信号;FLAIR上呈高信号,DWI呈高信号,ADC图呈高信号;1例行增强扫描未见强化。6例均见脑回肿胀,脑沟、脑池变浅,脑沟模糊不清,脑室系统变窄。4例随访显示原有病灶范围稍缩小,同时有脑萎缩表现。结论临床上有明确的甲苯接触史及相应的临床表现,程度较重者可致脑水肿,结合头颅MRI表现可对急性甲苯中毒性脑病的严重程度作出评估。     

非酒精性Wernicke脑病的MRI表现

目的探讨非酒精性Wernicke脑病的MRI特点,以提高对该种脑病的认识。方法回顾性分析5例非酒精性Wernicke脑病的MRI表现。结果 5例非酒精性Wernicke脑病中,3例显示为导水管周围、四叠体、第三脑室旁、双侧丘脑对称性稍长T1长T2信号,FLAIR、DWI呈高信号;1例显示为双侧丘脑、侧脑室旁、脑桥被盖对称性稍长T1长T2信号,脑沟旁大脑皮质等T1长T2信号,FLAIR、DWI呈均为高信号,1个半月后头颅MRI复查,两侧丘脑略增大,FLAIR序列见少许对称性稍高信号改变;1例T1WI、T2WI、FLAIR未发现异常,DWI序列显示四叠体边缘少许高信号。结论非酒精性Wernicke脑病具有典型的MRI表现,对临床诊断及治疗有重要意义。     

新生儿急性胆红素脑病的低场磁共振表现

目的 探讨急性胆红素脑病在低场磁共振的MRI表现.方法回顾分析15例急性胆红素脑病患儿的头颅MRI图像,同期的8例正常新生儿头颅MRI作对照.结果 15例急性胆红素脑病中,10例双侧苍白球T1WI呈对称性高信号,T2WI呈正常的稍高信号,其余5例未见明显异常.结论 低场MRI可较好地显示高胆红素血症对基底节苍白球的损伤,双侧苍白球T1WI对称性高信号是新生儿急性胆红素脑病的重要特征.     

Wernicke脑病的MRI表现及文献复习（附6例分析）

目的研究Wernicke脑病的MRI表现.材料和方法回顾性分析6例Wernicke脑病的MRI表现.结果MRI阳性表现4例,CT、MRI均未见异常2例.4例MRI显示第三、四脑室及中脑导水管周围斑片状长T2异常信号,T2 Flair及DWI均为高信号,增强扫描呈轻、中度增强.其中伴乳头体受累2例,T2WI信号增高,增强明显1例,萎缩1例.结论Wernicke脑病的MRI表现有其特异性,结合临床能早期诊断.     

儿童尿毒症脑病的MRI诊断

目的:探讨儿童尿毒症脑病的MRI诊断及鉴别诊断价值。方法:28例儿童尿毒症脑病患儿行颅脑MRI扫描,包括T1WI、T2WI、FLAIR及扩散加权成像,13例患儿行增强扫描。对其中20例发现颅脑局限性病灶患儿的MRI表现进行分析,包括病灶的部位、分布、大小及MRI影像特点。结果:20例发现颅脑局限性病灶,均为多发。病灶主要累及两侧顶枕叶皮层下白质,3例累及顶枕叶皮层和基底节区,呈对称性分布15例,非对称性分布5例。病灶最大径13mm,最小径3mm。于T1WI上呈低信号、T2WI上呈高信号、FLAIR图像上呈高信号者12例;于T1WI上呈等信号、T2WI上呈稍高信号、FLAIR图像上呈稍高信号者8例。DWI上呈较低及等信号、ADC图上呈较高信号12例,DWI上呈等信号、ADC图上呈稍高信号8例。所有局限性病灶均无强化。20例患儿对症治疗7～10d后复查MRI,14例患儿病灶完全消失,6例局限性病灶总数量由18个减少至10个,病灶最大径由平均8mm缩小至4mm,局限性病灶于T2WI和FLAIR图像上信号强度均较前减低。结论:结合患儿病史,MRI不仅能依据其典型表现对儿童尿毒症脑病作出明确诊断,而且在鉴别诊断、临床治疗后转归及预后评估等方面均具有重要的临床应用价值。     

基底节区异常信号的MRI鉴别诊断及临床价值

目的：探讨以基底节区异常信号为主要表现的疾病的MRI征象及鉴别诊断价值。方法：回顾性分析22例经临床证实的以基底节区异常信号为主要表现的疾病的MRI资料。结果：发生部位：苍白球9例,壳核17例,尾状核头部12例,合并双侧丘脑4例、脑干6例。肝豆状核变性4例;感染3例;中毒7例,其中CO中毒5例,霉变甘蔗中毒1例,糖尿病药物诱发的乳酸中毒1例;维生素B1缺乏性脑病1例;缺氧缺血损害7例,其中脑梗死4例,HIE 3例。信号特征：肝豆状核变性MRIT1WI等或稍低信号,T2WI高信号;感染、维生素B1缺乏性脑病、脑梗死、新生儿缺氧缺血性脑病,T1WI呈低信号,T2WI呈高信号;CO中毒4例及霉变甘蔗中毒1例表现为T1WI等、低信号,T2WI均为高信号,CO中毒1例及糖尿病药物诱发的乳酸中毒1例,表现为T1WI高信号,T2WI等信号;5例增强后病灶均有明显强化。脑梗死为非对称性分布,其余皆为对称性分布。结论：以基底节区异常信号为主要表现的疾病的MRI有一定的特征性,结合临床不难鉴别。     

Wernicke脑病的MRI诊断价值

目的探讨Wernicke脑病的MRI表现,以提高诊断水平。方法搜集7例经临床证实的Wernicke脑病的MRI资料进行回顾性分析。结果双侧丘脑、第三脑室周围广泛对称性异常信号(6例),导水管周围、桥脑被盖异常信号(7例),乳头体、丘脑下部、穹隆及四脑室周围异常信号(2例),上述病变呈长T1长T2信号,FLAIR序列呈高信号,2例DWI序列呈高信号,脑室壁模糊,2例静注Gd-DTPA增强后病变区域对比增强,1例可见侧脑室周围小血管放射状强化。结论Wernicke脑病具有典型的MRI表现,对临床诊断及治疗有重要意义。     

Wernicke脑病的临床与MRI诊断

目的:探讨Wernicke脑病(WE)的MRI表现,提高对该病的认识。方法:回顾性分析8例WE患者的临床资料及MRI表现。结果:8例患者中4例于第三脑室旁、乳头体、丘脑内、导水管周围白质区呈对称性损害,2例以乳头体、四叠体损害为主,2例症状较重者,除上述部位信号异常外,其脑干及小脑内见广泛异常信号;所有病灶均表现为T1WI低信号、T2WI高信号、FLAIR序列明显高信号改变。4例患者治疗前后行DWI(b=1000s/mm2)检查显示病灶呈高、等信号,3例治疗前ADC值下降,1例无变化,治疗后ADC值均升高。结论:WE的MRI表现具有特征性,MRI及DWI对该病的早期和进展期患者的诊断和判断预后具有重要价值。     

MRI诊断获得性肝性脑部变性的价值

目的:探讨获得性肝性脑部变性(AHCD)的脑部MRI表现特征,评价MRI对AHCD的诊断价值。方法:对18例经临床确诊为肝性脑病患者进行头颅MRI扫描,其中3例行增强扫描,4例同时行腹部MRI扫描,分析其MRI征象。结果:18例患者脑部MRI扫描均有阳性发现,主要显示基底节区信号强度对称性增高,双侧豆状核(18/18),中脑红核周围(16/18),垂体前叶(10/18)快速自旋回波(FSE)T1WI均表现为高信号,FES T2WI信号正常17例,高信号1例。18例T2FLAIR信号正常。病变区脑结构的体积、形态无变化。结论:MRI T1WI双侧基底节、中脑等部位出现高信号影,是AHCD较为特征性的影像学表现,MRI是发现这些病变最敏感的方法。     

Proton MR spectroscopy in Wernicke encephalopathy

Wernicke encephalopathy is caused by thiamine deficiency. Although the clinical picture has been well established for some time, clinical diagnosis is attained in only 20% of the cases. MR imaging techniques contribute to early diagnosis of Wernicke encephalopathy. We herein report MR imaging and proton MR spectroscopic findings for a patient with clinical and biochemical features consistent with Wernicke encephalopathy. Increased lactate and typical MR imaging findings are discussed in the context of the known pathophysiology of Wernicke encephalopathy.     

Wernicke encephalopathy: MR findings in five patients

Wernicke encephalopathy is a disease usually related to chronic alcoholism. The clinical diagnosis is often difficult to establish, and CT is unable to provide specific findings. MR follow-up studies in five patients affected by Wernicke encephalopathy were performed with the aim of establishing the sensitivity of MR in depicting the typical diencephalic/mesencephalic lesions. All subjects had MR imaging in the acute phase of the disease and were reexamined 6-12 months later, at which time they were in good health. Three of them also had CT scanning. On MR, hyperintense areas seen surrounding the third ventricle and aqueduct during the acute phase of the disease had disappeared or diminished on follow-up evaluations. The third ventricle and aqueduct were dilated. We suggest that these findings reflect the natural evolution of Wernicke encephalopathy. The MR findings in Wernicke encephalopathy enable early diagnosis of the disease, which has a positive effect on both treatment and prognosis.     

Wernicke encephalopathy: MR findings in five patients

Wernicke encephalopathy is a disease usually related to chronic alcoholism. The clinical diagnosis is often difficult to establish, and CT is unable to provide specific findings. MR follow-up studies in five patients affected by Wernicke encephalopathy were performed with the aim of establishing the sensitivity of MR in depicting the typical diencephalic/mesencephalic lesions. All subjects had MR imaging in the acute phase of the disease and were reexamined 6-12 months later, at which time they were in good health. Three of them also had CT scanning. On MR, hyperintense areas seen surrounding the third ventricle and aqueduct during the acute phase of the disease had disappeared or diminished on follow-up evaluations. The third ventricle and aqueduct were dilated. We suggest that these findings reflect the natural evolution of Wernicke encephalopathy. The MR findings in Wernicke encephalopathy enable early diagnosis of the disease, which has a positive effect on both treatment and prognosis.     

亚急性1,2-二氯乙烷中毒性脑病的CT、MR表现

目的:探讨1,2-二氯乙烷中毒性脑病的CT、MR表现.方法:回顾性分析5例经临床证实的1,2-二氯乙烷中毒性脑病的CT和MR资料,CT检查5例,MR检查3例.结果:CT检查病灶表现为低密度,两侧对称.5例均广泛累及两侧大脑半球白质(累及皮层下弓形纤维为主).累及两侧齿状核4例,丘脑、苍白球受累各3例.3例MRI均表现为上述部位广泛性T1WI低信号,T2WI高信号.CT、MRI都显示脑回肿胀,脑室系统受压变小.结论:1,2-二氯乙烷中毒性脑病具有较典型的CT、MRI特征,结合毒物接触史可明确诊断.     

Wernicke encephalopathy: MR findings in two patients

Wernicke encephalopathy is a serious neurologic disorder caused by vitamin-B1 or thiamine deficiency. In the literature the characteristic symmetric paraventricular lesions of Wernicke encephalopathy are hyperintense on T2-weighted sequences spin-echo (SE) and enhance on T1-weighted SE sequences after intravenous gadolinium administration in the acute phase. We present two patients in the acute phase of Wernicke encephalopathy with special reference to the MR imaging. One of our reported cases is special because of the MR demonstration of a hemorrhagic focus in the caput of the right nucleus caudatus. The other case demonstrates no enhancement on SE T1-weighted sequences after intravenous gadolinium administration. Received: 1 July 1998; Revision received: 19 January 1998; Accepted: 20 January 1998     

精囊出血的MRI诊断(附5例报告)

目的 :分析精囊出血的MR表现 ,提高对精囊出血病变的认识。方法 :对 5例精囊出血的病例分别采用轴位T1WI、T2 WI、T1WI脂肪抑制序列及矢状位T2 WI序列行MR检查 ,并回顾性分析MRI表现。结果 :精囊出血表现为条状、结节状或纡曲短T1、长T2 异常信号 ,T1压脂后病灶显示更清晰并同周围组织区分开来。结论 :各种序列结合使用的MRI是精囊出血的可靠的非创伤性诊断手段。