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    • 61. 发明授权
    • Apparatus for three dimensional tomography utilizing an electro-optic
x-ray detector
    • 使用电光X射线检测器的三维断层摄影装置
    • US4833698A
    • 1989-05-23
    • US891597
    • 1986-08-01
    • Brian P. FlanneryHarry W. DeckmanPeter M. EisenbergerWayne G. Roberge
    • Brian P. FlanneryHarry W. DeckmanPeter M. EisenbergerWayne G. Roberge
    • G01N23/04
    • G01N23/046G01N2223/419Y10S378/901
    • The present invention is an apparatus for producing tomographic images of an object comprising: a beam of collimated radiation transmitted through the object in a plurality of rays, an imaging electro-optic detector for detecting the attenuated transmitted radiation after it has passed through the object, the detector including an energy convertor, image format altering device, and a readout device, wherein the detector has a detective quantum efficiency greater than 0.05, a total signal dependent background less than 10 percent of the signal from the unattenuated x-ray beam, a useful dynamic range greater than 10, a non-uniformity of response between adjacent active pixels of less than 75%, and deviations of geometric linearity that is less than 10 pixels in the recorded image, means for obtaining the attenuation coefficients from the transmitted radiation, and means for computing a reconstructed image of the object from the attenuation coefficients.
    • 本发明是一种用于生成物体的断层图像的装置,包括:以多个射线透射通过物体的准直辐射束;成像电光检测器,用于在经过物体之后检测衰减的透射辐射, 所述检测器包括能量转换器,图像格式改变装置和读出装置,其中所述检测器的检测量子效率大于0.05,总信号依赖背景小于来自未衰减的X射线束的信号的10%, 有用的动态范围大于10,相邻有效像素之间的响应的不均匀性小于75%,以及在记录图像中小于10个像素的几何线性的偏差,用于从所发射的辐射获得衰减系数, 以及用于根据所述衰减系数计算所述对象的重建图像的装置。