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    Adaptive x-ray brightness and display control for a medical imaging system
    6.
    发明授权
    Adaptive x-ray brightness and display control for a medical imaging system 失效
    医疗成像系统的自适应x射线亮度和显示控制

    公开(公告)号：US5675624A

    公开(公告)日：1997-10-07

    申请号：US572414

    申请日：1995-12-14

    申请人： Gary F. Relihan ,  Steven P. Roehm ,  Ruchi Mangalik

    发明人： Gary F. Relihan ,  Steven P. Roehm ,  Ruchi Mangalik

    IPC分类号： H05G1/64 ,  A61B6/00 ,  H04N5/32 ,  H05G1/36 ,  H05G1/60

    CPC分类号： H04N5/32 ,  H05G1/36 ,  H05G1/60

    摘要： An x-ray imaging system includes a source of x-rays, a video camera which produces an image signal formed by x-ray attenuation values, and image signal processor and a video monitor for displaying the x-ray image. The system also has an automatic image control that includes a peak detector, an average brightness detector and a transfer function generator for the image processor. The peak detector receives the image signal and produces a video gain control signal for controlling the video camera in response to a comparison of a peak level of the image signal to a peak reference level. The average the brightness detector employs the image signal to produce a feedback signal which controls by the source of x-rays. The transfer function generator produces a histogram of intensity levels in the image signal which histogram forms a look-up table that is used by the image processor to transform the image signal into the adjusted image signal for display.

    摘要翻译： x射线成像系统包括x射线源，产生由x射线衰减值形成的图像信号的摄像机，以及用于显示x射线图像的图像信号处理器和视频监视器。 该系统还具有包括用于图像处理器的峰值检测器，平均亮度检测器和传递函数发生器的自动图像控制。 峰值检测器接收图像信号并产生用于响应于图像信号的峰值电平与峰值参考电平的比较来控制摄像机的视频增益控制信号。 亮度检测器的平均值采用图像信号产生由X射线源控制的反馈信号。 传递函数发生器产生图像信号中的强度级的直方图，该直方图形成由图像处理器将图像信号转换成经调整的图像信号进行显示的查找表。

    Noise filter for digital x-ray imaging system
    8.
    发明授权
    Noise filter for digital x-ray imaging system 失效
    数字X射线成像系统的噪声滤波器

    公开(公告)号：US5809105A

    公开(公告)日：1998-09-15

    申请号：US820794

    申请日：1997-03-19

    申请人： Steven P. Roehm ,  Ruchi Mangalik

    发明人： Steven P. Roehm ,  Ruchi Mangalik

    IPC分类号： G03B42/02 ,  A61B6/00 ,  H04N5/325 ,  H04N7/18 ,  H05G1/60

    CPC分类号： H04N5/325

    摘要： An x-ray fluorographic system produces frame images at a low dose rate for both on-line and off-line use. Background noise is filtered by first producing a mask which defines the boundaries of the structural features of interest. The mask is used to select the background pixels for filtering, while enabling the structural pixels to pass unfiltered to the display.

    摘要翻译： x射线荧光成像系统以低剂量率产生帧图像，用于在线和离线使用。 通过首先产生限定感兴趣的结构特征的边界的掩模来过滤背景噪声。 掩模用于选择用于过滤的背景像素，同时使结构像素未过滤到显示器。

    X-ray dose reduction in pulsed systems by adaptive X-ray pulse adjustment
    9.
    发明授权
    X-ray dose reduction in pulsed systems by adaptive X-ray pulse adjustment 失效
    通过自适应X射线脉冲调整，脉冲系统中的X射线剂量减少

    公开(公告)号：US5319696A

    公开(公告)日：1994-06-07

    申请号：US956204

    申请日：1992-10-05

    申请人： Aiman A. Abdel-Malek ,  Steven P. Roehm ,  John J. Bloomer

    发明人： Aiman A. Abdel-Malek ,  Steven P. Roehm ,  John J. Bloomer

    IPC分类号： H05G1/32 ,  H05G1/60 ,  H05G1/64 ,  H05G1/44

    CPC分类号： H05G1/60 ,  H05G1/32

    摘要： An interactive system for producing acceptable quality fluoroscopy images determines X-ray tube photon count and voltage while minimizing X-ray radiation dosage to a subject. Parameters of the subject and the type of image to be produced are provided to the system. X-ray tube voltage U and photon count Q are initialized at a fraction of conventional values for a portion of a subject to be imaged. An image is created and sectioned into rectangles. Rectangles having the greatest and least gradient values are used to determine variances indicating signal and noise power respectively. Images are produced and adjusted until the maximum transmitted power is reached, or the signal-to-noise ratio does not increase beyond a quality increment. The process is repeated to optimize X-ray tube voltage. The X-ray fluoroscopy procedure is then performed with the optimum X-ray tube photon count and the optimum X-ray tube voltage thereby reducing X-ray dosage. The optimization is repeated periodically to readjust the system.

    摘要翻译： 用于产生可接受质量的荧光透视图像的交互式系统确定X射线管光子计数和电压，同时使对受试者的X射线辐射剂量最小化。 将要生成的对象的参数和图像的类型提供给系统。 X射线管电压U和光子计数Q以被成像对象的一部分的常规值的一部分被初始化。 创建图像并将其分割成矩形。 具有最大和最小梯度值的矩形用于分别确定指示信号和噪声功率的方差。 生成和调整图像直到达到最大传输功率，或者信噪比不会超过质量增量。 重复该过程以优化X射线管电压。 然后用最佳X射线管光子计数和最佳X射线管电压进行X射线透视程序，从而降低X射线剂量。 定期重复优化以重新调整系统。

    Method and apparatus for identifying a patient
    10.
    发明授权
    Method and apparatus for identifying a patient 有权
    用于识别患者的方法和装置

    公开(公告)号：US07151435B2

    公开(公告)日：2006-12-19

    申请号：US10304538

    申请日：2002-11-26

    申请人： C. Cameron Brackett ,  Steven L. Fors ,  Mark M. Morita ,  John F. Moehrke ,  Steven P. Roehm

    发明人： C. Cameron Brackett ,  Steven L. Fors ,  Mark M. Morita ,  John F. Moehrke ,  Steven P. Roehm

    IPC分类号： G05B19/00 ,  G06F7/04 ,  G08B29/00 ,  H04B1/00 ,  H04L9/32

    CPC分类号： G06K17/00

    摘要： A method for updating information about a subject of interest is disclosed. The method comprises assigning the subject a unique signal which signal is physically associated with the subject, identifying the unique signal, and displaying information related to the subject assigned to the unique signal soon after the signal is identified. The method is preferably used in a hospital setting. Also disclosed is a device, a system, and a control program for use in updating information. The device comprises a control logic responsive to an external stimulus, a wireless signal detection unit, and a display unit that displays information about a subject that has been identified. The control program is used with a wireless detector and comprises a feature that controls display, a feature that identifies a signal associated with a subject, and a feature that displays information in response to the identification feature. Security features can also be incorporated.

    摘要翻译： 公开了一种更新关于感兴趣对象的信息的方法。 该方法包括：向被摄体分配与物体相关联的信号的唯一信号，识别唯一信号，以及在信号被识别之后不久就显示分配给唯一信号的被摄体的相关信息。 该方法优选用于医院环境中。 还公开了一种用于更新信息的装置，系统和控制程序。 该装置包括响应于外部刺激的控制逻辑，无线信号检测单元和显示关于已识别的对象的信息的显示单元。 控制程序与无线检测器一起使用，并且包括控制显示的特征，识别与对象相关联的信号的特征以及响应于识别特征显示信息的特征。 安全功能也可以并入。