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    • 6. 发明申请
    • Asymmetric flattening filter for x-ray device
    • 用于x射线装置的非对称平坦化滤光片
    • US20060256925A1
    • 2006-11-16
    • US11127343
    • 2005-05-11
    • Gary VirshupJames BoyeEdward SeppiHeinrich RiemGovin DasaniEdward Shapiro
    • Gary VirshupJames BoyeEdward SeppiHeinrich RiemGovin DasaniEdward Shapiro
    • G21K3/00
    • G21K1/10
    • Devices and methods for implementing selective, or asymmetric, attenuation of an x-ray beam. In one example, a filter is provided that is substantially in the form of a wedge where some portions of the filter are thicker, and thus provide greater attenuation, than other, thinner portions of the filter. The filter is situated between the target surface of the anode and the x-ray subject so that x-rays generated by the target pass through the filter before reaching the x-ray subject. Specifically, the filter is oriented so that the thicker portion of the filter receives the higher intensity portion of the x-ray beam, while the thinner portion of the filter receives the relatively lower intensity portion of the x-ray beam. Thus, the gain profile of the x-ray beam is flattened so that the intensity, or flux, of the x-ray beam is relatively uniform throughout a substantial portion of the beam profile.
    • 用于实现X射线束的选择性或不对称衰减的装置和方法。 在一个示例中,提供基本上为楔形件的过滤器,其中过滤器的一些部分比过滤器的其它较薄部分更厚,因此提供更大的衰减。 过滤器位于阳极的目标表面和X射线对象之间,使得由目标产生的x射线在到达x射线物体之前通过过滤器。 具体地,过滤器被定向成使得过滤器的较厚部分接收x射线束的较高强度部分,而过滤器的较薄部分接收x射线束的较低强度部分。 因此,x射线束的增益分布被平坦化,使得x射线束的强度或通量在光束轮廓的整个实质部分中相对均匀。
    • 9. 发明授权
    • Data signal amplifier and processor with multiple signal gains for increased dynamic signal range
    • 数据信号放大器和具有多个信号增益的处理器可增加动态信号范围
    • US07002408B2
    • 2006-02-21
    • US10685787
    • 2003-10-15
    • Pieter Gerhard RoosEdward SeppiRichard ColbethGary VirshupIvan Petrov Mollov
    • Pieter Gerhard RoosEdward SeppiRichard ColbethGary VirshupIvan Petrov Mollov
    • H03F1/36
    • 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的一个采样信号值越过所述预定的较高阈值且所述较小值不能穿过所述预定的下限阈值时,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的采样信号值的组合。