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    • 94. 发明授权
    • Apparatus and method of manufacturing a thermally stable cathode in an X-ray tube
    • 在X射线管中制造热稳定阴极的装置和方法
    • US08831178B2
    • 2014-09-09
    • US13540714
    • 2012-07-03
    • Sergio Lemaitre
    • Sergio Lemaitre
    • H01J35/06
    • H01J35/06
    • An x-ray imaging system includes a detector positioned to receive x-rays, an x-ray tube configured to generate x-rays toward the detector from a focal spot surface, the x-ray tube includes a target having the focal spot surface, a cathode support arm, and a cathode attached to the cathode support arm. The cathode includes a split cathode cup having a first portion and a second portion that is separate from the first portion, the first and second portions having respective first and second emitter attachment surfaces, and a flat emitter that is attached to the first and second emitter attachment surfaces such that, when an electrical current is provided to the first portion of the cathode cup, the current passes through the flat emitter and returns through the second portion of the cathode cup such that electrons emit from the flat emitter and toward the focal spot surface.
    • X射线成像系统包括被定位成接收x射线的检测器,被配置为从焦斑表面向检测器产生X射线的X射线管,X射线管包括具有焦点表面的靶, 阴极支撑臂和连接到阴极支撑臂的阴极。 阴极包括分开的阴极杯,其具有与第一部分分离的第一部分和第二部分,第一和第二部分具有相应的第一和第二发射器附接表面,以及平坦发射体,其连接到第一和第二发射体 附接表面使得当电流被提供到阴极杯的第一部分时,电流通过平面发射器并返回通过阴极杯的第二部分,使得电子从平坦发射体发射并且朝向焦点 表面。
    • 96. 发明授权
    • Temperature drift correction for multi-slice detector in computed tomography
    • 计算机断层扫描中多层检测器的温度漂移校正
    • US08757878B2
    • 2014-06-24
    • US13004300
    • 2011-01-11
    • Abdelaziz IkhlefJoseph James Lacey
    • Abdelaziz IkhlefJoseph James Lacey
    • G01D18/00A61B6/03H05G1/64
    • A61B6/032A61B6/0407A61B6/4233A61B6/4435A61B6/585G01T1/244
    • A system and method for temperature drift correction capability in a CT detector module is disclosed. A scintillator array of a CT detector module has a plurality of scintillator cells configured to detect high frequency electromagnetic energy passing through an object, with a plurality of photodiodes in a photodiode array optically coupled to the scintillator array to detect light output therefrom. A computer is provided that is programmed to measure a response of the plurality of photodiodes as a function of temperature, determine a transfer function indicative of the response of the plurality of photodiodes as a function of temperature, normalize the transfer function to a virtual operating temperature, measure a temperature of the photodiode array prior to a scan, determine a correction factor from the normalized transfer function based on the measured photodiode temperature and the virtual operating temperature, and apply the correction factor to the photodiode outputs.
    • 公开了一种用于CT检测器模块中的温度漂移校正能力的系统和方法。 CT检测器模块的闪烁体阵列具有多个闪烁体单元,其被配置为检测通过物体的高频电磁能,光电二极管阵列中的多个光电二极管与闪烁体阵列光耦合以检测从其发出的光输出。 提供了一种计算机,其被编程为测量作为温度的函数的多个光电二极管的响应,确定指示作为温度的函数的多个光电二极管的响应的传递函数,将传递函数归一化为虚拟操作温度 在扫描之前测量光电二极管阵列的温度,基于所测量的光电二极管温度和虚拟工作温度,从归一化传递函数确定校正因子,并将校正因子应用于光电二极管输出。