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    • 3. 发明授权
    • Asymmetric flattening filter for x-ray device
    • 用于x射线装置的非对称平坦化滤光片
    • US07397904B2
    • 2008-07-08
    • US11127343
    • 2005-05-11
    • Gary VirshupJames BoyeEdward J. SeppiHeinrich RiemGovin DasaniEdward Shapiro
    • Gary VirshupJames BoyeEdward J. 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。
    • 7. 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。