X-CT成像原理2

伦琴因发现X射线获得首届诺贝尔物理学奖。1901伦琴(Roentgen)发现X射线(1895)1914劳厄（Laue）晶体的X射线衍射1915布拉格父子(Bragg)分析晶体结构1917巴克拉(Barkla)发现元素的标识X射线1924塞格巴恩(Siegbahn)X射线光谱学1927康普顿(Compton等六人)康普顿效应1936德拜(Debye)化学1946马勒(Muller)医学1962沃生(Wason等三人)医学1964霍奇金(Hodgkin)化学1979柯马克和豪森菲尔德（Cormack/Hounsfield）医学1981塞格巴恩(Siegbahn)物理同X射线有关的诺贝尔奖正片与负片防护防护洛书九宫图，幻方洛书九宫图，幻方河出图,洛出书,圣人则之---易系辞伏羲时代,黄河中有龙马背负河图.夏禹时代,洛水中有神龟背负洛书.洛书九宫图，幻方洛书九宫图，幻方x1x2x3x6x5x4x9x8x715321xxx已经数字化ReconstructionIdea423324463742314321(FromG.Wang)AlgebraicReconstructionTechnique(ART)3232432000043264-22UpdateaguessbasedondatadifferencesGuess1Guess0Guess2ErrorError(FromG.Wang)洛书九宫图，幻方816729543洛书九宫图，幻方9876543210010101001000100011001001000100100100010010011110000000001110000000001111515151515151515xxxxxxxxxRxp稀疏矩阵比较图像恢复与图像重建nRxpnHfg融会贯通洛书九宫图，幻方816729543多个解演示MatlabFirstGenerationOnedetectorTranslation-rotationParallel-beam(FromG.Wang)SecondGenerationMultipledetectorsTranslation-rotationSmallfan-beam(FromG.Wang)ThirdGenerationMultipledetectorsTranslation-rotationLargefan-beam(FromG.Wang)FourthGenerationDetectorringSource-rotationLargefan-beam演示csim重建算法(FromG.Wang)Third&FourthGenerations(FromPicker)(FromSiemens)E-BeamCTScannerSpeed:50,100msThickness:1.5,3,6,10mmECGtriggercardiacimages(FromImatron)(FromG.Wang)Simultaneous•Sourcerotation•Tabletranslation•DataacquisitionSpiral/HelicalScanning演示MatlabSpiralCTScanner•GantryDataacquisitionsystem•Table•ComputerParallelprocessors•Controlconsole•StorageunitsTapes,disks•Recordingdevice•NetworkinterfaceX-raygeneratorHeatexchanger(FromElscint)SpiralCTScannerGantryDataacquisitionsystemDetectorsStorageunits:Tapes,disksDisplayControlconsoleComputerParallelprocessorTableRecordingSourceNetworkFilterDataAcquisitionSystem(DAS)SourceDetectorPre-CollimatorPost-CollimatorPatientScattering(FromG.Wang)DataAcquisitionSystem(DAS)X-rayTubeDetectorsCTGantry(FromSiemens)FilterSourceDetector(FromG.Wang)演示DrawSpiral