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1、InternationalStandardISO15708-4Secondedition2025-06Non-destructivetesting一Radiationmethodsforcomputedtomography一Part4:QualificationEssaisnondestructifsMethodesparrayonnementspourlatomographieinformatiseePartie4:QualificationReferencenumberISO15708-4:2025(en)ISO2025COPYRIGHTPROTECTEDDOCUMENTISO2025Al
2、lrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.Permissioncanberequestedfrom
3、eitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordiv1 Scope12 Normativereferences13 Termsanddefinitions14 Qualification
4、ofthetesting14.1 General14.2 Qualificationofdefecttesting24.2.1 General24.2.2 Objectsandfeatures24.2.3 Featuredetectability/testsystem/systemparameterisation24.2.4 Verificationofsuitability34.2.5 Consistencycheck34.2.6 Documentation44.3 Qualificationofdimensionaltesting44.3.1 General44.3.2 Testandme
5、asurementtask44.3.3 Dimensionaltesting/testsystem/systemparameterisation.44.3.4 Degreeofaccuracy54.3.5 Consistencycheck54.3.6 Documentation55 QualificationoftheCTsystem65.1 General65.2 Integraloverallsystemverification.65.3 Checkingthesystemcomponents65.3.1 General65.3.2 Manipulationsystem.65.3.3 Im
6、agescale65.3.4 Beamaxisperpendicularity65.3.5 Tubefocalspot65.3.6 Tubestability75.3.7 Detector75.3.8 Reconstruction75.3.9 Visualization75.4 DoCUmentatiOn.76 ExampleofCTsystemresolutionevaluationmethods.76.1 General.76.2 Acquisitionparameters86.3 Recommendationsforcreatingreferenceobjects86.4 Density
7、resolutionmeasurementmethod86.4.1 General86.4.2 Highenergyreferenceobject96.4.3 Lowenergyreferenceobject96.4.4 Experimentalmeasurements9ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandards
8、isnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeIn
9、ternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted
10、.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsin
11、respectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.HoweverlImplementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresp
12、onsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISOs
13、adherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT工seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC135,Non-destructivetesting,SubcommitteeSC5,Radiographictesting,incollaborationwiththeEuropeanCommitteeforStandardization(CEN)Technical
14、CommitteeCEN/TC138,Non-destructivetesting,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Thissecondeditioncancelsandreplacesthefirstedition(ISO15708-4:2017),whichhasbeentechnicallyrevised.Themainchangesareasfollows: additionofISO15708-1andISO15708-3asnormativeref
15、erencesinCIaUSe2; correctionoftitleinFigUre1: correctionofdensityvaluesdRofeachinsertandCTgreyvaluesNiin6.4.4; deletionofthebibliography; editorialchanges.AlistofallpartsintheISO15708seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/membnrs.htmLNon-destructivetestingRadiationmethodsforcomputedtomography一Par
