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ToevaluatethediagnosticvalueandfeasibilityofDWIcombinedwiththeFischerscoreindifferentialdiagnosisof breastcancerin3.0TMRI. Materials and methods:FromJuly2011toFebruary2015,the66cases(75lesion)(age18to80years,medianage45years) provenbypathology,allthepatientsunderwentMRplainscanning、T1Dynamiccontrast-enhanced(DCE)anddiffusion weightedimaging(DWI)scansat3.0T.25lesionswerebenignlesions(groupA)and50lesionsweremalignancelesions(group B),Selectthecontralateral22casesofnormalmammaryglandglandsizeasnormalcontrol(groupC)(age29to70years,median age45years).ThefinaldataswereusedFunctoolsoftwaretoanalyze.Atotalof66patientsparticipatedinthisprospectivestudy. Results:(1)Benignandmalignantbreastlesionsenhancemorphologicalcharacteristics,enhancetypeandhemodynamic characteristicssuchascleardifferences,Fischerscoreofbenigntumorwassignificantlylowerthanthatofmalignanttumor(p< 0.001),Withcutoffvalue3point,itssensitivity,specificityandaccuracywererespectively100%,76%and92%.(2)ADCavg, ADCminandADCmaxamongnormalglandulartissue,benignlesionsandmalignantlesionshadsignificantlydifferences(p< 0.001),witheachparameterdecreasingorderly.ADCdhadnosignificantdifferencebetweenbenignandmalignanttumors(p= 0.791),andADCdofbenignormalignanttumorweresignificantlylowerthanthatofnormalglandulartissue(p<0.001). ADCavgperformedbestindiagnosisofbreastcancer.Withcutoffvalue1.15×10-3mm2/s,itssensitivity,specificityandaccuracy wererespectively85%、98%and91.8%.(3)TheADCavgincombinationwithFischerscoreperformedbestindiagnosisofbreast cancer(AUC=0.975). Conclusion:FischerscoringsystemcombinedwithDWIin3.0TMRIishelpfulfordistinguishingbenignfrommalignantbreast masslesions,whichcanprovideanobjectivestandardandcriteriaindiagnosisofbreastcancer.