·113CHINESEJOURNALOFCTANDMRI,FEB.2023,Vol.21,No.02TotalNo.160【第一作者】唐茂文，男，住院医师，主要研究方向：低剂量CT研究。Email：18188018982@163.com【通讯作者】余晖，男，副教授，主要研究方向：医学影像诊断、神经影像。Email：331693861@qq.com论著StudyontheCharacteristicsofLiverCTEnhancedExaminationBaseontheConditionofIterativeReconstructionandLowkVpCTProtocol*TANGMao-wen1,2,LEIPing-gui2,LIFang-yan2,ZOUXun2,JIAOJun2,YUHui1,2,*.1.SchoolofMedicalImaging,TheAffiliatedHospitalofGuizhouMedicalUniversity,Guiyang550004,GuizhouProvince,China.2.DepartmentofRadiology,TheAffiliatedHospitalofGuizhouMedicalUniversity,Guiyang550004,GuizhouProvince,China.ABSTRACTObjectiveTostudythecharacteristicsofliverCTenhancedexaminationat80kVpwiththetechniqueofiterativereconstructionbasedonoriginaldata.MethodsThestudyretrospectivelycollected50patientssuspectedofhavingabdominallesions,twogroups[80kVpgroup(n=25)and120kVpgroup(n=25)]weregeneratedaccordingtothetubevoltage.The80kVpliverCTimageswithfilteredbackprojection(FBP)anddifferentSinogram-AffirmedIterativeReconstruction(SAFIRE)strengthlevels(S1~S5)wereobtainedbypost-processincomparisonto120kVpliverCTenhancedexaminationwithFBP,andimagequalitywasevaluatedbyquantitativelyandqualitatively.Forquantitativeassessment,theCTvalueofliverparenchymal,muscle,air,SDofair,contrast-to-noiseratio(CNR)andsignal-to-noiseratio(SNR)weremeasuredandcalculatedinthisstudy.Forthequalitativeassessment,thewholeimagequalitywasevaluatedblindbytwoexperiencedradiologists,andtheinter-observeragreementwasalsotested.CTDIvolwasrecorded,andSSDEwasalsocalculatedforeachpatient.ResultsCTDIvolandSSDEfor80kVpgroupwere(10.18±1.31)mGyandSSDE(16.11±2.20)mGy,respectively;However,CTDIvolandSSDEfor120kVpgroupwere(14.98±2.62)mGyandSSDE(23.02±1.87)mGy,respectively.Forquantitativeassessment,therewassignificantstatisticaldifferenceinCTvalueofliverparenchymalbetweentwogroups,aswellasCNRandSNRfor80kVp-FBPvs.80kVp-S3or80kVp-S3vs.120kVp-FBP.Forqualitativeassessment,thewholeimagequalitywassati...
