X射线成像闪烁体光产额测量技术与优化方法

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中图分类号：TL816.1 文献标识码：ADOI：10.37188/CJL.20240310 CSTR：32170.14.CJL.20240310

Light Yield Measurement Technology and Optimization Methods of X-ray Imaging Scintillator

ZHANGYugel，MAGe'，WANPengying²，BAO Zizhen³，OUYANGXiao LIU Linyue， OUYANG Xiaoping4

（1.Department of EngineeringPhysics，Tsinghua University，Beijing1Ooo84，China; 2.School ofMicroelectronics，Xi'anJiaotongUniversity，Xi'an71oo49，China; 3.CollegeofNuclearScienceand Technology，BeijingNormal University，Beijing1Oo875，China; 4.NorthwestInstituteofNuclearTechnology，Xi'an71OO24，China） *CorrespondingAuthor，E-mail：liulinyue@nint.ac.cn

Abstract：Scintilation imaging screens are critical components in X-ray imaging technology.The accurate measurementof their light yield playsapivotalroleinimproving thespatialresolutionofimaging systemsandadvancing thedevelopmentof new scintilators.This paperfirst provides anoverviewof the basic principles of X-rayimaging technology，followedbyareviewofthemain methodsformeasuring lightyieldinX-rayimagingscintilators.Thesemethods include relative measurement techniques based on energy spectra and X-ray excitation spectra，as wellas absolute measurement methods using photomultiplier tubes（PMTs）and photodiodes（PDs）or avalanche photodiodes （APDs）．Additionally，this paper summarizes thepotential impacts ofvarious factors onlight yield measurements，such as packagingandcoupling technologies，theenergycharacteristicsof theradiationsource，particletypes，andthe typesof photodetectorsused for lightyield measurements.Furthermore，an absolute light yield measurement method is proposed based ocorrecting the lightcollection eficiency.This method effectively combines the advantages ofthe absolute measurement techniques using PMTs andPDs，achieving wide-range light yield measurements（covering light outputs at the hundred-photons level）while maintaining alow measurement uncertainty of 5 %

KeyWords：scintilating imaging screens；light yield；measurement methods；uncertainty optimization

1引言

X射线成像技术凭借其揭示物体内部结构的能力，在医学诊断、工业检测及安全检查等多个领域均发挥着重要作用[1-3]。（剩余22347字）