Diagnostic radiology setup with means for suppressing stray radiation
    22.
    发明授权
    Diagnostic radiology setup with means for suppressing stray radiation 失效
    用于抑制杂散辐射的诊断放射学设置

    公开(公告)号:US4550419A

    公开(公告)日:1985-10-29

    申请号:US543208

    申请日:1983-10-19

    摘要: The invention relates to a diagnostic radiology setup with means for suppressing stray radiation and with an image intensifier television chain with image storing means. There is provided a perforated diaphragm of radiation-absorbing material near the tube, which diaphragm can be introduced into the ray path selectively. Two image memories for an X-ray picture with a diaphragm and an X-ray picture without a diaphragm and an image processing system serve for comparing the image information of the two X-ray pictures to determine and eliminate the stray radiation component.

    摘要翻译: 本发明涉及具有用于抑制杂散辐射的装置和具有图像存储装置的图像增强器电视链的诊断放射学装置。 在管附近设置有辐射吸收材料的穿孔隔膜,该隔膜可以选择性地引入射线路径。 用于具有隔膜的X射线照片和没有光阑的X射线照片的两个图像存储器和用于比较两个X射线照片的图像信息的图像处理系统用于确定和消除杂散辐射分量。

    Circuit arrangement for a detector for ionizing radiation
    23.
    发明授权
    Circuit arrangement for a detector for ionizing radiation 失效
    用于电离辐射的检测器的电路布置

    公开(公告)号:US4104524A

    公开(公告)日:1978-08-01

    申请号:US771847

    申请日:1977-02-25

    CPC分类号: H05G1/26 H05G1/32 H05G1/44

    摘要: In an illustrated embodiment, a detector having a plurality of measuring fields is provided with a computer circuit for the formation of a difference signal which corresponds to the difference between the greatest and the smallest output signal of the measuring fields, a computer circuit for the formation of a sum signal which corresponds to the sum of the greatest and the smallest output signal of the measuring fields, and a division circuit is connected to provide an output as a function of the difference signal divided by the sum signal, as a measure of contrast over the selected measurement surface. The contrast signal can be utilized to control the duration of an exposure. Further, the contrast signal can be used for an automatic adjustment of the x-ray tube high voltage during an exposure so as to achieve an optimum picture contrast.

    摘要翻译: 在示出的实施例中,具有多个测量场的检测器设置有用于形成对应于测量场的最大和最小输出信号之间的差的差分信号的计算机电路,用于形成的计算机电路 一个和信号对应于测量场的最大和最小输出信号之和的和信号,并且除法电路被连接以提供作为差分信号除以和信号的函数的输出作为对比度 超过选定的测量面。 对比度信号可用于控制曝光的持续时间。 此外,对比度信号可以用于在曝光期间自动调整X射线管高电压,以获得最佳图像对比度。