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    • 6. 发明申请
    • DATA SIGNAL AMPLIFIER AND PROCESSOR WITH MULTIPLE SIGNAL GAINS FOR INCREASED DYNAMIC SIGNAL RANGE
    • 数字信号放大器和具有增加的动态信号范围的多个信号增益的处理器
    • WO2005039039A2
    • 2005-04-28
    • PCT/US2004/033632
    • 2004-10-12
    • VARIAN MEDICAL SYSTEMS, INC.ROOS, Pieter, GerhardSEPPI, EdwardCOLBETH, RichardVIRSHUP, GaryMOLLOV, Ivan, Petrov
    • ROOS, Pieter, GerhardSEPPI, EdwardCOLBETH, RichardVIRSHUP, GaryMOLLOV, Ivan, Petrov
    • H03F
    • H03F3/08H03M1/18
    • Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The resultant signals have multiple signal values which are compared to predetermined lower and higher thresholds. The desired output signal is: the maximum sample signal value when the maximum value fails to traverse a predetermined lower threshold; the minimum sample signal value when an adjacent larger one of the plurality of sample signal values traverses a predetermined higher threshold; a smaller of mutually adjacent ones of a pair of the plurality of sample signal values when a larger one of the pair of sample signal values traverses the predetermined higher threshold and the smaller value fails to traverse the predetermined lower threshold; and a combination of the smaller and larger ones of the pair of sample signal values when the larger value traverses the predetermined lower threshold and fails to traverse the predetermined higher threshold.
    • 具有多个信号增益的数据信号放大和处理电路,用于增加动态信号范围。 输入数据信号根据多个信号增益进行处理。 所得到的信号具有与预定的较低和较高阈值进行比较的多个信号值。 所需的输出信号为:当最大值不能穿过预定的下限阈值时的最大采样信号值; 当所述多个采样信号值中的相邻较大的一个采样信号值穿过预定的较高阈值时的所述最小采样信号值; 当所述一对采样信号值中的较大一个穿过所述预定的较高阈值且所述较小值不能穿过所述预定下限阈值时,所述多个采样信号值对中的较小的一个; 以及当较大值穿过预定的下限阈值并且不能穿过预定的较高阈值时,该对采样信号值中的较小和较大者的组合。
    • 7. 发明申请
    • X-RAY TUBE HAVING A FOCAL SPOT PROXIMATE THE TUBE END
    • 具有一个焦点的X射线管可以延长管端
    • WO2009067623A1
    • 2009-05-28
    • PCT/US2008/084234
    • 2008-11-20
    • VARIAN MEDICAL SYSTEMS, INC.VIRSHUP, Gary
    • VIRSHUP, Gary
    • A61B6/00
    • H01J35/26
    • An x-ray tube having a reduced spacing between the focal spot of an anode and an adjacent end wall of an evacuated enclosure is disclosed. This in turn positions the tube relatively closer to the chest wall of a patient during mammography procedures. In one embodiment, the x-ray tube comprises an evacuated enclosure having first and second ends interconnected by a cylindrical side wall. The evacuated enclosure includes a rotor assembly having a bearing assembly and a stem. An anode is rot stably supported by the stem of the rotor assembly and includes a target surface and an opposite second surface. The target surface is positioned to face the bearing assembly, while the second surface is positioned to face the first end of the evacuated enclosure, with no intervening structure interposed therebetween. A cathode is included to emit electrons for impingement on a focal spot of the focal track.
    • 公开了一种具有减小的阳极焦点与抽空外壳的相邻端壁之间的间隔的X射线管。 这在乳房X射线摄影过程中又将管定位成更靠近患者的胸壁。 在一个实施例中,X射线管包括具有通过圆柱形侧壁互连的第一和第二端的抽真空的外壳。 抽真空的外壳包括具有轴承组件和杆的转子组件。 由转子组件的杆稳定地支撑阳极,并且包括目标表面和相对的第二表面。 目标表面定位成与轴承组件相对,而第二表面被定位成面对抽真空的外壳的第一端,其间没有中间的结构。 包括阴极以发射电子以撞击焦点轨迹的焦点。