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1. 发明授权

US06233349B1 Apparata and methods of analyzing the focal spots of X-ray tubes 失效
标题翻译：分析X射线管焦点的设计和方法
公开(公告)号：US06233349B1
公开(公告)日：2001-05-15
申请号：US08880097
申请日：1997-06-20
申请人： Stephen W. Gravelle , Paul G. Nagy
发明人： Stephen W. Gravelle , Paul G. Nagy
IPC分类号： G06K900
CPC分类号： G06T7/0006 , G06T2207/10116 , G06T2207/30108
摘要： An apparatus for determining the quality of X-ray tubes by analyzing filmed images of the focal spots produced by the tubes. In an exemplary embodiment of the apparatus, a slide scanner receives a filmed focal spot from an X-ray tube and scans it to produce a digital version of the focal spot. The digital focal spot is then analyzed by a personal computer to determine parameters relating to the focal spot such as its background and peak optical density, line spread function, modulation transfer function, skew, and loading. These parameters are then compared to parameter standards to determine whether the X-ray tube should be accepted or rejected under current quality standards.
摘要翻译：通过分析由管产生的焦点的成像图像来确定X射线管的质量的装置。在该装置的示例性实施例中，幻灯片扫描器从X射线管接收成像焦点并扫描它以产生焦点的数字版本。然后通过个人计算机分析数字焦点，以确定与焦斑有关的参数，例如其背景和峰值光密度，线扩散函数，调制传递函数，偏斜和加载。然后将这些参数与参数标准进行比较，以确定X射线管是否应以当前质量标准接受或拒绝。

2. 发明授权

US06356619B1 Varying x-ray tube focal spot dimensions to normalize impact temperature 失效
标题翻译：不同的X射线管焦点尺寸来规范冲击温度
公开(公告)号：US06356619B1
公开(公告)日：2002-03-12
申请号：US09586435
申请日：2000-06-02
申请人： Paul G. Nagy , Floribertus P. M. Heukensfeldt Jansen
发明人： Paul G. Nagy , Floribertus P. M. Heukensfeldt Jansen
IPC分类号： H01J3506
CPC分类号： H01J35/14 , H01J35/06
摘要： In an X-ray tube having an anode supported for rotation and an annular target track mounted upon the anode, a cathode spaced apart from the anode projects a beam of electrons onto the target track within a focal spot. The cathode is designed to normalize the impact temperature across the focal spot, as a function of length. In accordance therewith, the cathode comprises a filament and a cathode cup, wherein the filament is disposed to project the electron beam onto the target track to generate X-rays, when a high voltage potential difference is established between the filament and the anode. The filament and the cathode cup are respectively configured to selectively form the electron beam so that the beam provides an electron distribution within the focal point which maintains each point within the focal spot at substantially the same temperature.
摘要翻译：在具有被支撑为旋转的阳极和安装在阳极上的环形目标轨道的X射线管中，与阳极间隔开的阴极在焦点内将一束电子投射到目标轨迹上。阴极被设计成使焦点上的冲击温度归一化为长度的函数。根据此，阴极包括细丝和阴极杯，其中当灯丝和阳极之间建立高电压电位差时，灯丝设置成将电子束投射到靶轨道上以产生X射线。灯丝和阴极杯分别被配置成选择性地形成电子束，使得光束在焦点内提供电子分布，其将焦点内的每个点保持在基本相同的温度。

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