能谱纯化在胸部CT的应用ChestCTusingspectralfiltration刘杰第一页，共二十五页。图像(túxiànɡ)120kV第二页，共二十五页。图像(túxiànɡ)70kV第三页，共二十五页。研究(yánjiū)目的Todeterminetheradiationdose,imagequality,andclinicalutilityofnon-enhancedchestCTwithspectralfiltration.即将该新技术与普通胸部平扫在如下三方面(fāngmiàn)做对比辐射(fúshè)剂量Radiationdose图像质量Imagequality临床应用Clinicalutility第四页，共二十五页。ALARAprincipleaslowasreasonablyachievableHowmuchdosereductionisreasonable？VSadetailedassessmentofinterstitiallungdiseaseanexaminationperformedforlungnoduledetectionrequireasignificantlyhigherdose研究(yánjiū)背景第五页，共二十五页。In2014,athird-generationdual-sourceCTsystemwasintroduced.第三代双源CT问世Thissystemfeaturesatinfilter,whichcanbepositionedinfrontofbothX-raytubes,andwhichabsorbsprimarilylow-energyphotonsthatcontributelittletoimagequalitybutincreasethedoseofradiationthatapatientreceives.用该研究(yánjiū)来证实研究(yánjiū)背景第六页，共二十五页。Keypoints•Spectralfiltrationenablesnon-contrastchestCTwithveryhighdoseefficiency.•ThisapproachreducesCTDIvol,DLP,andSSDE(effectivechestdiameter28cm).•Lungnodules,pneumonia,andpleuralpathologiescanbeassessedwithuncompromisedconfidence.关键点第七页，共二十五页。25non-contrastchestCTexaminationsacquiredwithspectralfiltration(tin-filteredSn100kVpspectrum)25non-contrastchestCTexaminationsacquiredwithoutspectralfiltration(120kV).研究(yánjiū)方法实验组对照组图像质量(zhìliàng)评估内容3.Contrast-to-noise-ratio(CNR)4.figure-of-merit(FOM)5.Diagnosticconfidence1.Radiationmetrics2.Imagenoise第八页，共二十五页。CTacquisitionprotocol研究(yánjiū)方法第九页，共二十五页。StatisticalanalysisMedCalcSoftware,Ostend,BelgiumKolmogorov–SmirnovtestMann–Whitneytestschi-squaretestPvalues<0.05Kappastatistics所用(suǒyònɡ)软件：所用(suǒyònɡ)方法：柯尔莫可洛夫(luòfū)-斯米洛夫(luò曼-惠特尼检验第十页，共二十五页。Patientselection第十一页，共二十五页。Radiationmetrics第十二页，共二十五页。Diagnosticcon...
