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1、小脑肿瘤的低场MRI诊断与鉴别诊断［摘耍］冃的探讨小脑肿瘤在国产低场MRI表现及鉴别诊断耍点。方法回顾分析30例经手术病理证实的小脑肿瘤，其屮星形细胞瘤10例,髓母细胞瘤7例,室管膜瘤5例，血管母细胞瘤5例,转移痫2例,脑膜瘤1例，冋顾性分析其低场MRI表现。结果星形细胞瘤好发于小脑半球,T1WI低信号、T2WI高信号为主。实质部有轻微强化，囊变呈不规则环形强化。髄母细胞瘤:T1机呈低至中等信号,T2WI中等高信号。室管膜瘤:起源于四脑室，有不均匀的明显强化。血管母细胞瘤:均为人囊小结节型，增强扫描可清晰显示壁结节。转移
2、瘤:有原发病史。脑膜瘤:T1WI、T2WI均为等信号,有明显强化。结论低场MRI与高场MRI报道结果一致，对小脑肿瘤的诊断与鉴别诊断都具冇璽要作用。［关键词］小脑;肿瘤;国产;MRI诊断［中图分类号］R445.2［文献标识码］A［文章编号］1673-9701(2010)06-74-03DiagnosisandDifferentialDiagnosisofCerebellumTumorsUsingDomesticLowFieldMRImagingYEXueyiDepartmentofradiology,ThePeople"
3、sHospitalofLongchuan,Longchuan517300,China［Abstract］ObjectiveTostudydomesticMRIfeaturesanddifferentialdiagnosisofcerebellumtumors.Methods30casescerebellumtumorsprovedbyoperativeandpathology-Therewereastrotytomasin10,medulloblastomasin7,ependymoniasin5,hemangiobla
4、tomasin5,metastasisasin2,meningiomdasin1.ResultsAstrotytommostcommonincerebellum,itdemonstratedlowsignalintensityorisointensitysignalonTl-weightedimages,heterogeneouslyhighsignalintensityonT2-weighted・Thepartofsoldhas1ightenhancementatmagneticresonanceimages,cyst
5、ic1esionsmaydisplayheterogeneouslyofrankenhancementatmagneticresonanceimages-MedulloblastomdemonstratedlowsignalintensityorisointensitysignalonT1-weightedimages,meddlehighsignalintensityonT2-woighted・Ependymomcommoninthefourthventricle,itdisplayheterogeneouslyenh
6、ancementatmagneticresonanceimages.Hemangiobiatomisallkindofthelargecystic^smal1nutstyle,theymayrightcleartodisplaythenutenhancementatmagneticresonanceimages.Metastasishashistoryoftumorsinotherspartofbody・MeningiomademonstratedisointensitysignalonT1andT2-woightcdi
7、mages,andhotorogeneouslyenhancementatmagncticresonanceimages.Cone1usionLow-fieldMRTandhigh-fieldMRIhavethesameeffecttoimagingthecerebellumtumors,itisimportanttofeaturesanddifferentialdiagnosisofcerebellumtumors.［Keywords］Cerebe11um;Tumors;Domestic;MRIdiagnosisMRI
8、具有良好的软组织分辨力、三维成像能力及无骨伪影优势,极大提高了对小脑肿瘤的定性与定位诊断准确性。为临床手术治疗方案设计及术后评价提供可靠依据。现收集经手术病理证实的胶质细胞瘤、髓母细胞瘤、血管母细胞瘤共30例进行回顾分析，探讨其在低场磁共振的诊断与鉴别诊断要点。1材料与方法1.1研究材料本组30例中男女各15例，年龄
