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    • 11. 发明公开
    • Exposure management and control system and method
    • Belichtungsregelung und Regelungsvorrichtung -und Verfahren
    • EP1069807A2
    • 2001-01-17
    • EP00305882.3
    • 2000-07-12
    • GENERAL ELECTRIC COMPANY
    • Relihan, Gary FrancisGoodman, George CharlesGordon III, Clarence L.Ma, Baoming
    • H05G1/46
    • H05G1/58A61B6/545H05G1/46
    • An exposure management and control system and method for x-ray technique selection is provided. Optimal x-ray technique, which affects image quality, can be accurately predetermined to use for any application. A patient model is combined with a closed loop brightness control, using a parameter that does not affect image quality. This is used to create a control system that operates as a knowledge based control system. The x-ray system brightness control system comprises a first and second regulator. The first regulator is an image quality, or brightness, regulator. The brightness regulator can have multiple functions, such as peak mA control, power limiter, skin dose limiter, and an override function. The second regulator is a dose error regulator. The second regulator is independent of the first regulator, and cooperates with the first regulator to provide x-ray technique optimization independent of brightness control.
    • 提供了一种用于X射线技术选择的曝光管理和控制系统和方法。 影响图像质量的最佳x射线技术可以被准确地预定为用于任何应用。 患者模型结合闭环亮度控制,使用不影响图像质量的参数。 这用于创建一个作为基于知识的控制系统运行的控制系统。 x射线系统亮度控制系统包括第一和第二调节器。 第一个调节器是图像质量或亮度调节器。 亮度调节器可以具有多种功能,如峰值mA控制,功率限制器,皮肤剂量限制器和覆盖功能。 第二个调节器是剂量误差调节器。 第二个调节器独立于第一个调节器,并与第一个调节器配合提供独立于亮度控制的X射线技术优化。
    • 17. 发明公开
    • Automatic brightness compensation for x-ray imaging systems
    • Automaticallyche HelligkeitskompensationfürbildgebendeRöntgenanlage。
    • EP0450970A2
    • 1991-10-09
    • EP91303011.0
    • 1991-04-05
    • GENERAL ELECTRIC COMPANY
    • Meccariello, Thomas VincentBelanger, Barry Fredric
    • H05G1/36H05G1/60H04N5/321H05G1/46
    • H05G1/46H05G1/36H05G1/60
    • The brightness of an X-ray video image during fluorography is maintained at a substantially constant level varying the X-ray dose in relation to changes in the average brightness of the X-ray image. As the X-ray system approaches the limits of its imaging capability, varying the X-ray dose alone may not yield the desired brightness level. At this point, the gain applied to the video signal is increased to improve the brightness. A linear brightness taper function is used such that, as the level of video gain required to maintain constant brightness increases, the actual video gain increases by a smaller proportional amount. This function results in the brightness of the video image decreasing somewhat as the video gain is required to provide a greater degree of brightness compensation. This reduction in brightness not only provides a visual indication to the image observer that the system is approaching the imaging limits, but also creates an illusion that noise artifacts in the image are not intensifying as the video gain increases.
    • 荧光成像期间的X射线视频图像的亮度维持在相对于X射线图像的平均亮度的变化改变X射线剂量的基本上恒定的水平。 随着X射线系统接近其成像能力的极限,单独改变X射线剂量可能不会产生所需的亮度水平。 此时,增加施加到视频信号的增益以提高亮度。 使用线性亮度渐变功能,使得随着保持恒定亮度所需的视频增益的水平增加,实际的视频增益增加了较小的比例量。 该功能导致视频图像的亮度随着视频增益需要提供更大程度的亮度补偿而稍微降低。 亮度的这种降低不仅为图像观察者提供了系统正在接近成像限制的视觉指示,而且还产生了视频增益增加时图像中的噪声伪影不会增强的错觉。
    • 18. 发明公开
    • Recognition system for the chemical constitution of plastic materials by means of electromagnetic waves
    • 识别系统的塑料与电磁波的帮助下,化学结构。
    • EP0419753A1
    • 1991-04-03
    • EP89830424.1
    • 1989-09-28
    • GOVONI SPA
    • Gulmini, Carlo
    • H05G1/46G01N33/44
    • G01N33/442H05G1/26H05G1/46
    • The identification system essentially consists of an emission source (1) of electromagnetic waves which are sent towards a receiver-sensor (2) fitted at a distance determined in advance. In absence of an interposed body the energy level reaching the receiver-sensor (2) is the reference measurement. Owing to the interposition between the emission source (1) and the receiver-sensor (2) of a plastic material body (3), such as polypropylene, polythene, polystyrene, vinyl chloride resin and others, a specific and charateristic modification is obtained of the energy level that can be observed for each type ofr different interposed plastic material, by reading the voltage level supplied by the receiver-sensor (2).
    • 该识别系统基本上besteht哪个朝向接收器 - 传感器发送的电磁波的发射源(1)的(2)装配以预先开采的距离确定的。 在不存在插入的身体的能量水平到达接收器传感器(2)为基准测量。 由于发射源(1)和接收器 - 传感器(2)的塑料材料体(3)之间插置:例如聚丙烯,聚乙烯,聚苯乙烯,氯乙烯树脂等,具体的和charateristic改性得到的 的能量水平并可以观察到对于每种类型的OFR不同插入的塑料材料,通过读取由接收器 - 传感器(2)所提供的电压电平。