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1、中國醫(yī)學(xué)影像技術(shù)2017年第33卷第4期ChinJMedImagingTechnol,2017,Vol33,No4·603·?影像技術(shù)學(xué)FeasibilityofautomaticspectralimagingprotocolselectionandadaptivestatisticaliterativereconstructioninreducingradiationandiodinecontrastdoseinabdominalCTA1,ZUOZiwei1,XUYingjin1,WANGJianing1,LIUHuaijun2*,GUONing3YINXiaoping(1.CT/
2、MRIDivision,AffiliatedHospitalofHebeiUniversity,Baoding071030,China;2.DepartmentofMedicalImaging,theSecondHospitalofHeibeiMedicalUniversity,Shijiazhuang051005,China;3.GECTResearchCentre,Beijing100176,China)[Abstract]ObjectiveToinvestigatethefeasibilityofautomaticspectralimagingprotocolselection
3、(ASIS)andadaptivestatiaticaliterativereconstruction(ASiR)techniquetoreduceradiationdoseanddoseofcontrastagent.MethodsSixty-fourpatientsunderwentroutineabdominalexaminationwererandomlydividedintotwogroups.ThetestgroupusedASIStechnique,with30%ASiRand50%ASiRreconstructionalgorithm.Thecontrolgroupu
4、sed120kVptubevoltage,FBPreconstructionmethod.Thenoiseofliver,pancreas,sacrospinalmuscle,CNRofliverandpancreas,subjectiveimagescoreinarterialphaseandportalvenousphasewerecomparedbetweentheimageof70keV+30%ASIRandcontrolgroup.CNRofabdominalaortaanditsbranchs,CNRofportalvein,andsubjectiveimagescore
5、werestatisticallyanalyzedbetweenim-age55keV+50%ASiRandcontrolgroupinthearterialphaseandportalvenousphase.ResultsComparedwithcontrolgroup,CTdoseindexvolumeforarterialphaseandportalvenousphaseintestgroupdecreasedby23.68%,23.57%anddoselengthproductdecreasedby25.61%,18.45%,totalcontrastinjectiondec
6、reased16.86%,thenoiseofliver,pancre-asandsacrospinalmusclein70keV+30%ASiRwerelowerthanthoseofcontrolgroupinabdominalarterialandportalphase(allP<0.05).CNRofabdominalaorta,superiormesentericartery,celiacaxisandscorein55keV+50%ASiRwerehigherthanthoseofcontrolgroupinabdominalarterialphase(allP<0.05
7、),CNRofportalveinandscoreinportalphasehadnostatisticallydifference(allP>0.05).ConclusionCombiningofASISandASiRincluding70keV+30%ASiRand55keV+50%ASiR,imagesaresuperiortothatoftheconventional120kVp+FBPscanmodeforabdominalCTimageandv