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1、磁敏感加权成像对脑梗死的诊断价值郭大静，陈维娟，吴伟，张维，罗银灯，赵建农(400010重庆重庆医科大学附属第二医院放射科)【摘要】目的探讨磁敏感加权成像(SW1)对脑梗死的诊断价值。方法搜集经临床及影像学检査证实的脑梗死患者38例，急性期15例，亚急性期17例，慢性期脑软化灶6例。所冇患者均行常规T,WKT2WT.LFLATR平扫、DWI及SWI扫描，其中25例行MRA检査。分析MRI图像特点。结果常规MRI检出脑梗死灶内出血5例18个出血灶,SWI检出脑梗死灶内出血11例62个出血灶,SWI对脑梗死灶内出血灶的检出率明显高于常规MRI序列(PV0.05)<>急性期15
2、例脑梗死灶SWT图像均表现为等信号，亚急性期11例为等信号，6例为低信号，慢性期6例均为低信号，不同时期脑槌死灶SWI信号特点差异有统计学意义(/<0.05)。急性期15例脑槌死灶内小静脉明显减少，亚急性期9例脑樓死灶内小的脉减少，8例脑梗死灶内小静脉及邻近脑组织内血管较对侧增多tilIlli,慢性期6例脑软化灶内均可见増粗迂曲血管影，不同时期脑梗死灶内静脉血管的显示差异冇统计学意义(PV0.05)。1RA显示17例患者一侧人脑中动脉闭塞，SWI均显示闭塞大脑屮动脉内的血栓。结论SW1在显示脑梗死并发出血、脑梗死后血管构建等方面优于常规MRI序列，和常规MRI序列结合对
3、脑梗死的诊断更为准确、全而，有重要的临床应用价值。【关键词】磁墩感加权成像；磁共振；脑梗死【中图法分类号】【文献标志码】ADiagnosticvalueofsusceptibilityweightedimagingincerebralinfarction:reportof38casesGuoDajing,ChenWeijuan,WuWei,ZhangWei,LuoYindeng,ZhaoJiannong(DepartmentofRadiology,SecondAffiliatedHospital,ChongqingMedicalUniversity,Chongqing40
4、0010,China)[Abstract]ObjectiveToinvestigatethediagnosticvalueofsusceptibilityweightedimaging(SWI)incerebralinfarction.MethodsThirty-eightpatientswithclinicalorradiologicalprovedcerebralinfarctionwereenrolledinthisstudy,including15acutecerebralinfarctionand17subacutecerebralinfarctioncases
5、and6chroniccerebralinfarctioncaseswithencephalamalacia.Conventionalnon-contrastsequencesincludingTjWI,T2WI,T2fluidattenuatedinversionrecovery(FLAIR),diffusionweightedimaging(DWI)andSWIwereperformedinallpatients,and25patientsunderwentmagneticresonanceangiography(MRA).Characteristicsofthese
6、imageswereanalyzed.ResultsEighteenhemorrhagiclesionswithininfarctionweredetectedin5patientsbyroutinesequences,whileSWIshowed62hemorrhagiclesionswithininfarctionin11patients(P<0.05).OnSWI,acutecerebralinfarctionappearedisointensityinall15cases,subacuteinfarctiondisplayedisointensity(11case
7、s)andhypointensity(6cases),andallchronicinfarction(6cases)demonstratedhypointensity.Theintensitydifferenceindifferentstageshasstatisticalsignificance(P<0.05).SWIfoundreducedvenulainsidetheinfarctedareasinall15acutecases，andrevealedreducedvenula(9cases)andincreasedan
