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1. 发明授权

US06320936B1 X-ray tube assembly with beam limiting device for reducing off-focus radiation 失效
标题翻译：具有用于减少离焦辐射的光束限制装置的X射线管组件
公开(公告)号：US06320936B1
公开(公告)日：2001-11-20
申请号：US09449778
申请日：1999-11-26
申请人： William P. Holland, Sr. , Timothy J. Holland , Matthew J. Holland , Michael L. Holland
发明人： William P. Holland, Sr. , Timothy J. Holland , Matthew J. Holland , Michael L. Holland
IPC分类号： G21K102
CPC分类号： G21K1/10 , G21K1/02
摘要： A beam limiting apparatus is provided for reducing the amount of off-focus radiation in the image-forming beam emitted from an x-ray tube assembly. The x-ray tube assembly has a housing with an x-ray port for the passage of x-rays therethrough, a mounting boss defining the x-ray port, an x-ray tube mounted within the housing and defining a glass envelope, an anode mounted within the glass envelope, and a cathode spaced relative to the anode within the glass envelope. A peripheral flange of the beam limiting apparatus is mountable to the mounting boss of the x-ray tube housing, and a radiation-absorbing body of the beam limiting apparatus projects downwardly from the peripheral flange through the x-ray port. The radiation-absorbing body is formed of an electrically nonconductive, filled epoxy resin material, and defines a base surface, an x-ray entrance aperture formed through the base surface, an x-ray exit aperture spaced relative to the x-ray entrance aperture, and an x-ray transmissive beam conduit formed between the entrance and exit apertures. An x-ray transmissive window is integrally molded with the radiation-absorbing body and extends across the beam conduit. The base surface of the radiation-absorbing body is spaced closely adjacent to the glass envelope of the x-ray tube and defines a predetermined gap therebetween. The x-ray tube housing also is molded of an electrically non-conductive, radiopaque, filled epoxy resin material, and includes a conductive outer surface formed of a conductive coating.
摘要翻译：提供了一种用于减少从X射线管组件发射的图像形成光束中的离焦辐射量的光束限制装置。 X射线管组件具有一个带X射线端口的外壳，用于通过X射线通道，一个安装凸台限定x射线端口，x射线管安装在外壳内并限定玻璃外壳，安装在玻璃外壳内的阳极以及在玻璃封套内相对于阳极隔开的阴极。光束限制装置的外围法兰可安装到X射线管壳体的安装凸台上，并且光束限制装置的辐射吸收体从周边凸缘通过x射线端口向下突出。辐射吸收体由不导电的填充的环氧树脂材料形成，并且限定基底表面，穿过基底表面形成的x射线入口孔，相对于x射线入口孔间隔的X射线出射孔以及形成在入口孔和出口孔之间的x射线透射束导管。 x射线透射窗与辐射吸收体整体模制并且横跨束导管延伸。辐射吸收体的基面与X射线管的玻璃外壳紧密地隔开并且在它们之间形成预定的间隙。 X射线管外壳也由不导电的不透射线填充的环氧树脂材料模制，并且包括由导电涂层形成的导电外表面。

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