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1、ComparisonofESWANperformanceswithdifferentparametersofparamagneticmaterialat3TLeduXiaolan,LvFajin[作者简介]勒都晓兰（1986-），女，籍贯：四川攀枝花，临床医学7年制学生，研究方向：神经系统影像诊断学，E-mail：leduxiaolan@126.com，电话：13648314334。[通讯作者]吕发金，教授，硕士生导师，重庆医科大学附属第一医院放射科，邮编：400016，E-mail：fajinlv@163.com。,ChenLi,YaoKaiqing,LiJianqiu（Depart
2、mentofRadiology,theFirstAffiliatedHospitalofChongqingMedicalUniversity,Chongqing400016,China）[Abstract]ObjectiveTostudytheinfluencesoftheESWANsequenceparametersettingsonthecharacteristicsofimagingandthesensitivityofparamagneticionwithexperimentalmethodsinvitro.MethodsToestablishamodelofparamagne
3、ticmaterial,tochangethenumbersofechotime,flipangle(FA),bandwidth(BW),fieldofview(FOV)ontheESWANsequenceandrepeatscanning.Thesignalchangeswereobservedandthephasevaluesoftheinterestingareaindifferentpositionsatallimagesweremeasured.TherelationshipbetweentheESWANimagingandthedifferentparameterswasa
4、nalyzed.ResultsTheESWANsignalofFe2+wasslightlyhigh,thephasevalueincreasedwiththeconcentrationwhenitwaslow,whilethephasevaluedecreasedwiththeincreasedartifacts.Thephasevalue’schangeswerelackofspecificitywithdifferentnumbersofechotime,flipangle,bandwidth,andfieldofview.Thecontrasttonoiseratio(CNR)
5、wasgreaterwhenthenumbersofechotimeweresmallersincetheconcentrationwasincreased(P<0.05),theCNRdifferencebetweendifferentflipangleswasnotstatisticallysignificant(P>0.05),theCNRvaluewasgreaterwhenbandwidthwaswider(P<0.05),theCNRdifferencebetweendifferentFOVswasnotstatisticallysignificant(P>0.05).[C
6、onclusion]TheCNRwasdifferentwithchoosingdifferentparametersaccordingtodifferentconcentrations.TheESWANfeaturesvarywithdifferentparameters.ReasonableparametersettingsplayanimportantroleinshowingparamagneticsubstanceswithESWANsensitivelyandeffectively.[Keywords]Magneticresonanceimaging;Enhancedgra
7、dientechoT2*weightedangiography;phase;parametersCorrespondingauthor：LvFajin，Tel：023-89012228，E-mail：fajinlv@163.com.3TESWAN序列不同参数对顺磁性物质成像效果的对比研究勒都晓兰，吕发金1，陈莉，姚开情，李剑秋（重庆医科大学附属第一医院放射科，重庆400016）[摘要]目的采用体外实验方法比较研究ESWAN序列参数设置对顺磁性离
