ASTM E1411-2009 X射线透视系统鉴定的标准实施规程

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【英文标准名称】:StandardPracticeforQualificationofRadioscopicSystems
【原文标准名称】:X射线透视系统鉴定的标准实施规程
【标准号】:ASTME1411-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E07.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:contrastsensitivity;duplexwiregage;edgesharpening;focaldetectordistance(FDD);focalobjectdistance(FOD);focalspotsize;imageprocessor;imagequalityindicator;imager;line-pairgage;magnification;nearreal-timeradioscopy;no
【摘要】:Aswithconventionalradiography,radioscopicexaminationisbroadlyapplicabletothemanymaterialsandobjectconfigurationswhichmaybepenetratedwithX-raysorgammarays.Thehighdegreeofvariationinarchitectureandperformanceamongradioscopicsystemsduetocomponentselection,physicalarrangementandobjectvariables,makesitnecessarytoestablishthelevelofperformancewhichtheselectedradioscopicsystemiscapableofachievinginspecificapplications.Themanufactureroftheradioscopicsystem,aswellastheuser,requireacommonbasisfordeterminingtheperformanceleveloftheradioscopicsystem.Thispracticedoesnotpurporttoprovideamethodtomeasuretheperformanceofindividualradioscopicsystemcomponentswhicharemanufacturedaccordingtoavarietyofindustrystandards.Thispracticecoversmeasurementofthecombinedperformanceoftheradioscopicsystemelementswhenoperatedtogetherasafunctionalradioscopicsystem.Thispracticeaddressestheperformanceofradioscopicsystemsinthestaticmodeonly.Radioscopycanalsobeadynamic,real-timeornearreal-timeexaminationtechniquewhichcanallowtest-partmotionaswellasparameterchangesduringtheradioscopicexaminationprocess.Theuseofthispracticeisnotintendedtobelimitingconcerningtheuseofthedynamicpropertiesofradioscopy.Usersofradioscopyarecautionedthatthedynamicaspectsofradioscopycanhavebeneficialaswellasdetrimentaleffectsuponsystemperformanceandmustbeevaluatedonacase-by-casebasis.Thisqualificationprocedureisintendedtobenchmarkradioscopicsystemperformanceunderselectedoperatingconditionstoprovideameasureofsystemperformance.Qualificationshallnotrestrictoperationoftheradioscopicsystematotherradioscopicexaminationparametersettingswhichmayprovideimprovedperformanceonactualexaminationobjects.Radioscopicsystemperformancemeasuredpursuanttothispracticedoesnotguaranteethelevelofperformancewhichmayberealizedinactualoperation.Theeffectsofobject-geometryandorientation-generatedscatteredradiationcannotbereliablypredictedbyastandardizedexamination.Allradioscopicsystemsageanddegradeinperformanceasafunctionoftime.Maintenanceandoperatoradjustments,ifnotcorrectlymade,canadverselyaffecttheperformanceofradioscopicsystems.Theperformanceoftheradioscopicsystemoperatorinmanualandsemi-automaticradioscopicsystemsisnottakenintoaccountinthispracticeandcanhaveamajoreffectuponradioscopicsystemperformance.Operatorqualificationsareanimportantaspectofsystemoperationandshouldbecoveredinaseparatewrittenprocedure.1.1ThispracticeprovidestestandmeasurementdetailsformeasuringtheperformanceofX-rayandGammarayradioscopicsystems.Radioscopicexaminationapplicationsarediverse.Therefore,systemconfigurationsarealsodiverseandconstantlychangingasthetechnologyadvances.1.2Thispracticeisintendedasameansofinitiallyqualifyingandre-qualifyingaradioscopicsystemforaspecifiedapplicationbydeterminingitsperformancelevelwhenoperatedinastaticmode.Systemarchitectureincludingthemeansofradioscopicexaminationrecordarchivingandthemethodformakingtheaccept/rejectdecisionarealsouniquesystemfeaturesandtheireffectuponsystemperformancemustbeevaluated.1.3Thegeneralprinciples,asstatedinthispractice,applybroadlytotransmitted-beampenetratingradiationradioscopysystems.Otherradioscopicsystems,suchasthoseemployingneutronsandComptonback-scatteredX-rayimagingtechniques,arenotcoveredastheymayinvolveequipmentandapplicationdetailsuniquetosuchsystems.1.4Units8212;Thevalu......
【中国标准分类号】:C43
【国际标准分类号】:19_100
【页数】:12P.;A4
【正文语种】:英语