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1、2007IEEENuclearScienceSymposiumConferenceRecordN24-58MaterialDiscriminatedX-RayCTbyUsingConventionalMicrofocusX-RayTubeandCdTeImagerY.Onishi,T.Nakashima,A.Koike,H.Morii,Y.Neo,H.Mimura,T.AokiResearchInstituteofElectronics,ShizuokaUniversity,Hamamatsu,JapanA
2、bstract–MaterialdiscriminatedX-rayCTsystemhasbeenphotoncountingtypedetectorthatcanobtainintensityconstructedbyusingconventionalmicro-focusedX-raytubeinformationwithenergyinformationofX-ray.Awhite(smallwhiteX-raysource)andphotoncountingtypeCdTeX-rayspectrum
3、ofanX-raytubecanbetreatedaspolychromaticimagerwithenergy-banddiscriminatefunction.WehavealreadyX-raysbythedetectoroftheenergydistinctiontype.reportedmaterialidentifyX-rayCTusingK-shelledgedata.InTherefore,theimageincludingenergyinformationcanbethisreportth
4、eprincipleofmaterialdiscriminationwasadaptedconstructed.Inthisexperiment,thematerialwasdiscriminatedtheseparationofelectron-densityandatomicnumberfrombyusingdualenergyX-rayCT(DXCT)method.DXCTisaattenuationcoefficientmappinginX-rayCTreconstructedimageindual
5、energyX-rayCTmethod.ThedualenergyX-raymethodmethodofobtaininganatomicnumberandanelectrondensitywasobtainedgoodelectron-densitymappingsbyusingtwofromthelinearattenuationcoefficientoftwodifferentmonochromeX-raysource,however,itisdifficultforveryenergies.Wetr
6、iedthreemetalmaterials(aluminum,titanium,large-scaleequipmentsuchasanacceleratortobenecessaryandiron)discriminationbyusingDXCTmethod.toapplythissystemtohomelandsecurityfieldattheairportandsoon.ThemeasurementsamplewaspreparedasthreekindsII.PRINCIPLEmaterial
7、rods(Aluminum(Al),Titanium(Ti),Iron(Fe)of6mm-diameter).WecouldobservedmaterialdiscriminatedA.X-rayabsorptionX-rayCTreconstructedimage,however,thediscriminationTheintensityofX-raythatpenetratedmaterialisexpressedpropertieswerenotgoodthantwomonochromeX-rayCT
8、asfollows.method.ThisresultswascouldbeexplainedbecauseX-ray−ȝ()E,Z⋅dscattering,beam-hardeningandsoonbasedonwhiteX-rayI()E=I0()E⋅e(1)source,whichcouldnotobserveintwomonochromeX-rayCTmethod.However,sinceourdeve
