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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1.250021;2.250011):CT:Catphan500Solidose400CTCTCT(CTDI):CT,:CT,;CTDI,,,,X;;:R814.42:A:1006-9011(2006)09-0978-04ThestudyofCTscannerqualitycontroltestQIHeng2tao1,QINWei2chang1,LIUChuan2ya1,WANGWei21.ShandongMedicalImagingResearchInstitute,Jinan250021,P.R.China2.DepartmentofImaging,ShandongProvincialQianfoshanHospital,Jinan250014,P.R.ChinaAbstractObjective:TostudyandapplythemethodofQCtestforCTscanners.Methods:WemeasuredthefollowingperformanceparametersforCTscanners:scanlocalizationlightaccuracy,tablemovementaccuracy,slicewidth,CTvaluelinearityandcontrastscale,fielduniformity,noise,highcontrastresolution,lowcontrastresolution,CTdoseindex(CTDI)withCatphan500phantommadebythephantomlaboratoryofU.S.Aandmulti2purposedosimetermadebySwedishalkCorporation.Results:AllCTscannersasappraisedarequalifiedasthewhole,butpartofmechanicparametersarebeyondtheregulatedlimits.Conclusion:ToassuretheperformanceofCTsys2temandmaintaintheoptimizedimagequalityaccordingtotheimagequalityparameterstest,suchasnoise,CTvaluelinearity,contrastresolutionetal.ItisimportanttounderstandtheradiationdangerlevelandoptimizethescanningprotocolbycheckinguptheCTDI.KeywordsTomography,X2raycomputed;Qualitycontrol(QC);TestmethodsCT1972,McCulloughCT(EMI),CT(ACTA)CT(Delta)QA[1]McCullough,CT1(AAPMRe2portNo.1)[2]1977AAPM1,CT,CT,AAPM199339[3]200274[4]119957[5],19964X(CT):(1982-),,,,[6]CTAAPM200274X(CT),CTCT11.1CTCatphan500,,CT,solidose4001.2SIEMENSSomatomSensation16:120kV,310mAs,12115mm,:9mm415mm115mm,512512,(fieldofview,FOV)8792006169JMedImagingVol.16No.92006©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:120kV,380mAs,24112mm,:916mm418mm214mm,512512,FOV150mm150mm,H31smediumsmoothCT2C3000:120kV,300mAs,:7mm,512512,FOV150mm150mm,1.31.3.1CTCatphan500CTP401CT,,(36912);CT,,,CT()(),,(),,mm1.3.2Catphan500CTP401,23,Zmm,,X:ZX=tan23Z=0142XX(slicesensitivityprofile)Z,(fullwidthhalfmaximum,FWHM)X:ROICT:CT,,,CT,CTCT2,CT,AACT,,(),,tan23,1.3.3CTCTXCTCTXCTCatphan500CTP40141125cm,(Teflon,)(Acrylic)(LDPE)(),X0121900137401177,R0I4CT,,CT,4CT,4,SAS,1.3.4Catphan500CTP401,,5mm25mm,5mm5mm,,,,0142,1.3.5X10%,[7],,30mm,121Lp/cmCatphan500CTP528,,CT,,1.3.6X1%,[7]9792006169JMedImagingVol.16No.92006©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=CT-CT+5SDmax,L=(CT-CT)/2,,,,1.3.7CT,40mm,CTP486,CT20HU(518HU),ROI4CT,CT1.3.8CTCT,Catphan500(CTP486),ROICTN=011%[8],CT1.3.9CT(CTDI),-7T+7T,N[9,10]:CTDI=1NT7T-7TD(z)dzD(z);T;N;,,,,,,211CTSIEMENSSomatomSensation16SIEMENSSomatomSensation64CT2C30001mm000.12(mm)9.04.51.59.64.82.478.824.401.689.244.622.526.853CT(cmHu)-11.56E2041.68E2042.04E2044HU4.02.25.150.450.290.356(mm)0.710.710.717(mm)3@1%,3@0.5%3@1%,3@0.5%3@1%,4@0.5%8(mm)0.260.120.329()45.8246.6831.383CTCT,,CT,CT,CT,X;CT;CT;CT,(,),0892006169JMedImagingVol.16No.92006©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:[1]McCulloughEC,PayneJT,BakerHL,etal.Performanceevaluationandqualityassuranceofcomputedtomographyscannerswithillustra2tionsfromtheEMI,ACTA,anddeltascanners[J].Radiology,1976,120:173-188.[2]WhiteDR,SpellerRD,TaylorPM.Evaluatingperformancecharacter2isticsincomputerizedtomography[J].BrJRadiol,1981,54:221-231.[3]AAPMReportNo.39,Specificationandacceptancetestingofcomput2edtomographyscanners[J]AmericanInstituteofPhysics,1993.[4]AAPMReportNo.74,Qualitycontrolindiagnosticradiology,MedicalPhysicsPublishing,2002.[5]43,1995,7.[6]X(CT),1997.[7].[M].:,2003.302-303.[8],,,.CT.,1999,16:218-219.[9].CT[J].,1997,17:347-351.[10].CT[J].,2004,24:178-180.(:2006-04-10:2006-05-12)(974):4T1WI,T2WIT2WI,,,,,(35)3,,35,,,[14],,,,,,,25%[1,2]CT,,,,,,,,,20%50%,8,[2,3]CT:,MR:T1WI,T2WIT2WI,,,,,,,,,,,,,,,:[1]OtalP,MeghaniS,HassisseneS,etal.Imagingofretroperitonealgan2glioneuroma[J].EurRadiol,2001,11:940.[2],,,.CT[J].,2001,17:428-430.[3],,,.[J].,2002,21:527-530.[4],.[M].:,,1997.478.(:2005-10-28:2005-12-07)1892006169JMedImagingVol.16No.92006
本文标题:CT机质量控制检测的探讨
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