标签: photon

RealisticImageSynthesisUsingPhotonMapping

摘要：本教程介绍如何正电子发射断层显像（PET）成像系统产生的3-D医疗图像。文章详细介绍了如何PET系统检测伽玛射线产生的掺糖注射时不同的反应，受影响的组织。本文还讨论了如何竞争环境中的电气噪声影响成像，以及为什么它是重要的，准确地检测出光子的时间和运动，因此在患者中产生的信号可以本地化。通常在PET系统功能框图显示的IC元件。Maxim>Designsupport>Appnotes>A/DandD/AConversion/SamplingCircuits>APP4680Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4680Keywords:PET,positronemissiontomography,medicalimaging,medicalscan,3-Dmedical,gammarays,photon,electricalcomponentsformedicalMay10,2010APPLICATIONNOTE4680IntroductiontoPositronEmissionTomography(PET)ImagingAbstract:Thistutorialexplainshowpositronemissiontomography(PET)imagingsystemsgenerate3-Dmedicalimages.ThearticledetailshowthePETsystemdetectsgamma-raysproducedwheninjecteddopedsugarsreactdifferentlytoaffectedtissue.Thearticlealsodiscus……

比较器用来检测单个光子的伽马辐射。示意图、设计注意事项和组件选择进行讨论。Maxim/Dallas>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUTOMOTIVEMEASUREMENTCIRCUITSKeywords:gammaray,photon,radiationdetector,lownoiseopamp,PIN,photodiode,gammaradiation,Jul21,2003operationamplifiers,opamps,comparatorAPPLICATIONNOTE2236Gamma-PhotonRadiationDetectorAPINphotodiode,fourlow-noiseopampsandacomparatorareusedtodetectindividualphotonsofgammaradiation.Theschematic,designconsiderationsandcomponentselectionarediscussed.ThecircuitofFigure1includesaPINphotodiodethatdetectsindividualphotonsofgammaradiation.Whenaphotonstrikesadepletionregioncreatedbyreversebiasonthephotodiode,itproducesasmallamountofchargeinproportiontothephoton'senergy.Theresultingsignalisthen……

：PIN光电二极管，四个低噪声运算放大器和比较器，用于探测单个光子的伽玛射线。的原理，设计考虑和选择组件进行了讨论。Maxim/Dallas>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUTOMOTIVEMEASUREMENTCIRCUITSKeywords:gammaray,photon,radiationdetector,lownoiseopamp,PIN,photodiode,gammaradiation,Jul21,2003operationamplifiers,opamps,comparatorAPPLICATIONNOTE2236Gamma-PhotonRadiationDetectorAPINphotodiode,fourlow-noiseopampsandacomparatorareusedtodetectindividualphotonsofgammaradiation.Theschematic,designconsiderationsandcomponentselectionarediscussed.ThecircuitofFigure1includesaPINphotodiodethatdetectsindividualphotonsofgammaradiation.Whenaphotonstrikesadepletionregioncreatedbyreversebiasonthephotodiode,itproducesasmallamountofchargeinproportiontothephoton'senergy.Theresultingsignalisthen……