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公开(公告)号：US5224143A
公开(公告)日：1993-06-29
申请号：US649041
申请日：1991-02-01
申请人： Horia Dumitrescu , Bernard Evain , Antoine Simeone
发明人： Horia Dumitrescu , Bernard Evain , Antoine Simeone
CPC分类号： H01J35/06 , H01J35/14 , H01J2235/068
摘要： The invention relates to X-ray tubes. The cathode for an X-ray tube has two filaments associated with a deflecting and focusing device which comprises at least three metal parts which are electrically insulated from one another and which are raised to electrical voltages. First and second ones of the metal, parts are associated with a first filament, while the second metal part and a third metal part are associated with the second filament.
摘要翻译： 本发明涉及X射线管。 用于X射线管的阴极具有与偏转和聚焦装置相关联的两根细丝，其包括彼此电绝缘且升高到电压的至少三个金属部件。 第一和第二金属部件与第一细丝相关联，而第二金属部分和第三金属部分与第二细丝相关联。
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2.发明授权Method, tube and system for eliminating a fixed antiscatter grid in a radiological image 失效用于消除放射图像中固定抗体网格的方法，管和系统
公开(公告)号：US5195120A
公开(公告)日：1993-03-16
申请号：US811649
申请日：1991-12-23
申请人： Bernard Evain , Olivier Peyret , Horia Dumitrescu
发明人： Bernard Evain , Olivier Peyret , Horia Dumitrescu
CPC分类号： H01J35/06 , A61B6/5252 , G03B42/02 , G21K1/025 , H01J2235/068
摘要： In a radiological apparatus using an antiscatter grid, this grid is kept fixed instead of being movable, and its image is removed by irradiating it as well as the object to be examined by two X-ray sources that have to be separated by a distance b determined by the first zero of the modulation transfer function of this two-source system. To take account of the magnification G, the distance b can be adjusted by means of a cathode emitting two electron beams with adjustable deflection.
摘要翻译： 在使用反散射网格的放射学装置中，该格栅保持固定而不是可移动的，并且其图像通过用必须分开距离b的两个X射线源照射和被检查物体而被去除 由该双源系统的调制传递函数的第一个零确定。 为了考虑放大率G，可以通过发射具有可调偏转的两个电子束的阴极来调节距离b。
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公开(公告)号：US5125019A
公开(公告)日：1992-06-23
申请号：US494444
申请日：1990-03-16
摘要： In an x-ray tube of the beam deflection type for a radiology apparatus, the stair-steps of the focusing device of the electron beam are extended by metallic deflecting electrodes placed in parallel relation to said stair-steps and electrically insulated from these latter by means of insulating layers. Said electrodes are brought to different potentials, the polarities and values of which depend on the direction and amplitude of deflection to be obtained.
摘要翻译： 在用于放射学装置的光束偏转型的X射线管中，电子束的聚焦装置的台阶由金属偏转电极延伸，金属偏转电极与所述台阶平行地放置并与这些电极电绝缘 绝缘层的手段。 所述电极被带到不同的电位，其极性和值取决于要获得的偏转的方向和幅度。
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