RF slipring receiver for a computerized tomography system

    公开(公告)号:US06433631B1

    公开(公告)日:2002-08-13

    申请号:US09928620

    申请日:2001-08-13

    IPC分类号: H03D100

    摘要: A computerized tomography (CT) system having an apparatus and method for receiving high data rate communication is disclosed herein. The apparatus includes a controlled variable attenuator for attenuating an encoded digital data signal having a wide range of power levels, a digital envelope detector for de-encoding the encoded digital data signal, a noise filtering circuit for filtering out the residual undesirable encoded signal components, and a feedback loop for maintaining a desired signal level such that the encoded digital data signal is converted to its pre-encoded state suitable for processing to generate a CT image.

    Dual control of image level and window parameters of a display and the
like
    3.
    发明授权
    Dual control of image level and window parameters of a display and the like 失效
    显示器的图像级和窗口参数的双重控制等

    公开(公告)号:US4839805A

    公开(公告)日:1989-06-13

    申请号:US552665

    申请日:1983-11-17

    IPC分类号: G06F3/033

    CPC分类号: G06F3/033 Y10T74/20201

    摘要: Dual control of image level and window of a display is accomplished by rotation of a single trackball. Rotation of the trackball within a first band including the X axis controls one parameter, and rotation of the trackball in a second band including the Y axis controls a second parameter. No changes are made in the parameters in response to rotation of the trackball in a third deadband laying between the first band and second band. The operator of a tomography system can readily change display parameters by rotation of the trackball while viewing the display.

    摘要翻译: 通过单个轨迹球的旋转来实现显示器的图像级别和窗口的双重控制。 轨迹球在包括X轴的第一频带内的旋转控制一个参数,轨迹球在包括Y轴的第二频带中的旋转控制第二参数。 响应于位于第一带和第二带之间的第三死区中的轨迹球的旋转,在参数中不做任何改变。 断层扫描系统的操作者可以通过观看显示器的轨迹球的旋转来容易地改变显示参数。

    Apparatus for altering the spatial characteristics of a digital image by
polynomial interpretation using sets of arithmetic processors
    4.
    发明授权
    Apparatus for altering the spatial characteristics of a digital image by polynomial interpretation using sets of arithmetic processors 失效
    用于通过使用一组算术处理器的多项式解释来改变数字图像的空间特性的装置

    公开(公告)号:US4611348A

    公开(公告)日:1986-09-09

    申请号:US675056

    申请日:1984-11-26

    CPC分类号: G06T3/4007 H04N1/3935

    摘要: A set of two processors operates on image pixel data using polynomial interpolation to generate pixel data for a spatially varied image. Image data is first stored in a buffer memory, and constants used in the polynomial interpolation are stored in a constants memory. One processor operates on the data from the buffer memory using constants from the constants memory, and the interpolated data is then stored in a display memory. The second processor controls the interpolation process by addressing the memories for the retrieval and storage of data.

    摘要翻译: 一组两个处理器使用多项式插值对图像像素数据进行操作,以生成空间变化图像的像素数据。 图像数据首先存储在缓冲存储器中,多项式插值中使用的常数存储在常量存储器中。 一个处理器使用来自常数存储器的常数对来自缓冲存储器的数据进行操作,然后将内插的数据存储在显示存储器中。 第二处理器通过寻址用于检索和存储数据的存储器来控制插值处理。

    Method and system for diagnostic imaging using a digital phase locked loop
    6.
    发明授权
    Method and system for diagnostic imaging using a digital phase locked loop 有权
    使用数字锁相环诊断成像的方法和系统

    公开(公告)号:US08085075B2

    公开(公告)日:2011-12-27

    申请号:US11894003

    申请日:2007-08-16

    IPC分类号: H03L7/06

    CPC分类号: A61B6/032 H03L2207/50

    摘要: A method and apparatus are provided for minimizing output pulse jitters in a phase locked loop. The method includes pre-setting the digital phase locked loop to a desired frequency, locking the digital phase locked loop to the desired frequency to generate an output signal, and filtering the output signal of the digital phase locked loop to maintain undesirable jitter to an acceptable range. In one embodiment, the apparatus is a medical imaging device. In another embodiment, the apparatus is a baggage imaging device.

    摘要翻译: 提供了一种用于最小化锁相环中的输出脉冲抖动的方法和装置。 该方法包括将数字锁相环预先设定到期望的频率,将数字锁相环锁定到期望的频率以产生输出信号,以及对数字锁相环的输出信号进行滤波,以将不需要的抖动保持在可接受的范围 范围。 在一个实施例中,该装置是医疗成像装置。 在另一个实施例中,该装置是行李成像装置。

    Method and system for diagnostic imaging using a digital phase locked loop
    7.
    发明申请
    Method and system for diagnostic imaging using a digital phase locked loop 有权
    使用数字锁相环诊断成像的方法和系统

    公开(公告)号:US20090045859A1

    公开(公告)日:2009-02-19

    申请号:US11894003

    申请日:2007-08-16

    IPC分类号: H03L7/06 A61B6/00

    CPC分类号: A61B6/032 H03L2207/50

    摘要: A method and apparatus are provided for minimizing output pulse jitters in a phase locked loop. The method includes pre-setting the digital phase locked loop to a desired frequency, locking the digital phase locked loop to the desired frequency to generate an output signal, and filtering the output signal of the digital phase locked loop to maintain undesirable jitter to an acceptable range. In one embodiment, the apparatus is a medical imaging device. In another embodiment, the apparatus is a baggage imaging device.

    摘要翻译: 提供了一种用于最小化锁相环中的输出脉冲抖动的方法和装置。 该方法包括将数字锁相环预先设定到期望的频率,将数字锁相环锁定到期望的频率以产生输出信号,以及对数字锁相环的输出信号进行滤波,以将不需要的抖动保持在可接受的范围 范围。 在一个实施例中,该装置是医疗成像装置。 在另一个实施例中,该装置是行李成像装置。

    System and method for data slipring connection
    8.
    发明授权
    System and method for data slipring connection 有权
    数据滑移连接的系统和方法

    公开(公告)号:US07079619B2

    公开(公告)日:2006-07-18

    申请号:US10707478

    申请日:2003-12-17

    IPC分类号: H05G1/60

    摘要: A direct electrical connection is provided between transmission line segments of a data slipring and a data acquisition system. A transformer may be provided between the data acquisition system and the transmission line segments for correcting an impedance mismatch between the slipring and the electrical connection. A method of connecting the data slipring with the data acquisition system includes providing a controlled impedance electrical cable between the transmission line segments and the data acquisition system.

    摘要翻译: 在数据滑环和数据采集系统的传输线段之间提供直接电连接。 可以在数据采集系统和传输线段之间提供变压器,用于校正滑环和电连接之间的阻抗失配。 将数据滑环与数据采集系统连接的方法包括在传输线段和数据采集系统之间提供受控阻抗电缆。

    RF slipring receiver for a computerized tomography system
    9.
    发明授权
    RF slipring receiver for a computerized tomography system 失效
    用于计算机断层摄影系统的射频滑盖接收器

    公开(公告)号:US06301324B1

    公开(公告)日:2001-10-09

    申请号:US09282535

    申请日:1999-03-31

    IPC分类号: A61B603

    CPC分类号: H04L27/06

    摘要: A computerized tomography (CT) system having an apparatus and method for receiving high data rate communication is disclosed herein. The apparatus includes a controlled variable attenuator for attenuating an encoded digital data signal having a wide range of power levels, a digital envelope detector for de-encoding the encoded digital data signal, a noise filtering circuit for filtering out the residual undesirable encoded signal components, and a feedback loop for maintaining a desired signal level such that the encoded digital data signal is converted to its pre-encoded state suitable for processing to generate a CT image.

    摘要翻译: 本文公开了一种具有用于接收高数据速率通信的装置和方法的计算机断层摄影(CT)系统。 该装置包括用于衰减具有宽范围功率电平的编码数字数据信号的受控可变衰减器,用于对编码的数字数据信号进行解码的数字包络检测器,用于滤除残留的不需要的编码信号分量的噪声滤波电路, 以及用于维持期望信号电平的反馈回路,使得编码的数字数据信号被转换成适于处理以产生CT图像的其预编码状态。

    Digital encoding of RF computerized tomography data
    10.
    发明授权
    Digital encoding of RF computerized tomography data 有权
    RF计算机断层摄影数据的数字编码

    公开(公告)号:US06181766B2

    公开(公告)日:2001-01-30

    申请号:US09139697

    申请日:1998-08-25

    IPC分类号: A61B603

    CPC分类号: A61B6/56 Y10S378/901

    摘要: A serial digital bit signal having signal bits occurring in a bit interval and at a signal bit speed, and each signal bit representing, alternatively, a first logic state and a second logic state, is transferred across a rotating interface by encoding each first logic state bit with a digital radio frequency (RF) carrier signal and coupling the encoded signal across the interface with an RF slipring.

    摘要翻译: 具有以位间隔和信号位速度出现的信号位的串行数字位信号,以及表示第一逻辑状态和第二逻辑状态的每个信号位通过编码每个第一逻辑状态 与RF数字射频(RF)载波信号进行比较,并将编码的信号跨接口与RF滑条耦合。