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    • 3. 发明授权
    • Method for the operation of an automatic x-ray exposure unit
    • 自动X射线曝光单元的操作方法
    • US5485501A
    • 1996-01-16
    • US288043
    • 1994-08-10
    • Horst Aichinger
    • Horst Aichinger
    • A61B6/00H05G1/36H05G1/44H05G1/60H05G1/64
    • H05G1/60H05G1/36H05G1/44
    • An x-ray examination installation includes an x-ray source for irradiating an examination subject with x-rays, and an automatic exposure unit having a radiation detector composed of a matrix of detector elements. Only the output signals of specified detector elements, which define the measuring field within which an optimum exposure should ensue, are utilized for generating a signal which is then supplied to the x-ray source for controlling the exposure dose. The automatic exposure unit is operated according to a method wherein a distribution of the grayscale values in a test image is first calculated, and subsequently the main image is produced with the previously-calculated distribution of grayscale values superimposed in the main image.
    • X射线检查装置包括用于用X射线照射检查对象的X射线源和具有由检测器元件的矩阵组成的放射线检测器的自动曝光单元。 仅使用定义要在其中进行最佳曝光的测量场的指定检测器元件的输出信号来产生信号,然后将该信号提供给用于控制曝光剂量的x射线源。 根据首先计算测试图像中的灰度值的分布并随后以先前计算的叠加在主图像中的灰度值分布来产生主图像的方法来操作自动曝光单元。
    • 5. 发明授权
    • Automatic x-ray exposure unit for mammography
    • 用于乳房X线摄影的自动X光曝光单元
    • US5371777A
    • 1994-12-06
    • US60529
    • 1993-05-13
    • Karlheinz KoehlerHorst Aichinger
    • Karlheinz KoehlerHorst Aichinger
    • H05G1/36H05G1/42H05G1/46
    • H05G1/42H05G1/36H05G1/46
    • An automatic x-ray exposure unit for mammography permits a correction of the mAs product dependent on the subject thickness without the need for obtaining a transparency signal, and thus without the need for the double detector normally needed for that purpose. The automatic x-ray exposure unit permits the correction to be undertaken on site, prior to conducting an actual examination, and thus can be used for film/foil systems, such as customized systems for which no previous transparency data has been obtained. This is accomplished in an automatic x-ray exposure unit where the mAs product is obtained for a fraction (1/n) of the total exposure, and a total exposure value is then obtained by multiplying the fractional value by n. These values are used to generate a characteristic curve, which is stored, for the film/foil system being used. If it is then necessary to switch (adjust) the mAs value due to the subject thickness, this can be done using the stored curve.
    • 用于乳房摄影的自动X射线曝光单元允许根据被摄体厚度校正mAs产品,而不需要获得透明度信号,因此不需要为此目的而通常需要的双重检测器。 自动X射线曝光单元允许在进行实际检查之前现场进行校正,因此可以用于薄膜/箔系统,例如没有获得先前透明度数据的定制系统。 这是在自动X射线曝光单元中实现的,其中获得总曝光的分数(1 / n)的mAs乘积,然后通过将分数值乘以n获得总曝光值。 这些值用于产生用于所使用的胶片/箔系统的特征曲线。 如果需要切换(调整)由于被测物厚度引起的mAs值,则可以使用存储的曲线来完成。