利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.033 秒)

    Method for adaptively filtering doppler signals using a complex time domain filter
    2.
    发明授权
    Method for adaptively filtering doppler signals using a complex time domain filter 失效
    使用复杂时域滤波器自适应滤波多普勒信号的方法

    公开(公告)号：US5445156A

    公开(公告)日：1995-08-29

    申请号：US333184

    申请日：1994-11-02

    申请人： Christopher M. W. Daft ,  Anne L. Hall ,  Sharbel E. Noujaim ,  Lewis J. Thomas ,  Kenneth B. Welles, II

    发明人： Christopher M. W. Daft ,  Anne L. Hall ,  Sharbel E. Noujaim ,  Lewis J. Thomas ,  Kenneth B. Welles, II

    IPC分类号： G01S7/52 ,  G01S15/89 ,  A61B8/00

    CPC分类号： G01S7/52071 ,  G01S15/8979 ,  G01S7/52026 ,  G01S7/52033

    摘要： A time domain technique for implementing an adaptive wall filter improves imaging of low-velocity blood flow by removing signals associated with slowly moving tissue. Adaptive wall filtering is performed by estimating wall velocity and bandwidth, and then filtering the basebanded data with a complex time domain notch filter. The wall velocity estimate determines the center frequency of a wall signal while the wall variance estimate determines the wall signal bandwidth. The complex filter coefficients selected are those which will center the complex notch filter on the wall center frequency, and which will set the filter cutoff frequencies (measured from this center frequency) to match the wall signal bandwidth.

    摘要翻译： 用于实现自适应壁滤器的时域技术通过去除与缓慢移动的组织相关的信号来改善低速血流的成像。 通过估计墙体速度和带宽进行自适应壁面滤波，然后用复杂时域陷波滤波器对基带数据进行滤波。 墙壁速度估计确定墙壁信号的中心频率，而墙壁方差估计确定壁信号带宽。 选择的复杂滤波器系数是将复杂陷波滤波器置于壁中心频率上的复数滤波器系数，并且将设置滤波器截止频率（从该中心频率测量）以匹配壁信号带宽。

    Ultrasound color flow extended velocity estimation
    4.
    发明授权
    Ultrasound color flow extended velocity estimation 失效
    超声色彩流动扩展速度估计

    公开(公告)号：US5363851A

    公开(公告)日：1994-11-15

    申请号：US158139

    申请日：1993-11-26

    申请人： Anne L. Hall ,  Richard B. Bernardi

    发明人： Anne L. Hall ,  Richard B. Bernardi

    IPC分类号： G01S15/58 ,  G01S15/89 ,  A61B8/00

    CPC分类号： G01S15/582 ,  G01S15/8981

    摘要： A multi-lag method for estimating both high and low velocities of blood flow from a single set of firings in situations where both high-velocity and low-velocity signals are of interest. A color flow processor uses multiple lags in the firing sequence. The normal lag of unity is used for high-velocity estimation; lags greater than unity are used for low-velocity estimation. A normal firing sequence is set up with a pulse repetition frequency that allows accurate velocity estimation of the highest flow velocity that the operator expects. This sequence yields data that is appropriately wall filtered, and a high-velocity estimate is made by correlation over adjacent firings, that is, firings 1 and 2, 2 and 3, 3 and 4, and so on, to the end of the packet, are respectively correlated. The same data is then used to provide a low-velocity estimate. The correlation is calculated between firings that are spaced by multiple units of the pulse repetition interval, e.g., by correlating firings 1 and 3, 2 and 4, 3 and 5, and so on.

    摘要翻译： 一种多滞后方法，用于在高速和低速信号都感兴趣的情况下，从单组发射中估计血液流速的高低速度。 颜色流处理器在点火顺序中使用多个滞后。 统一的正常滞后用于高速估计; 滞后大于单位用于低速估计。 正常的点火顺序以脉冲重复频率设置，可以准确地估计运算符所期望的最高流速。 该序列产生适当地经过过滤的数据，并且通过相邻发射的相关性进行高速度估计，即，对分组的结尾处的发射1和2,2,3,3和4等等 ，分别相关。 然后使用相同的数据来提供低速估计。 在通过脉冲重复间隔的多个单位间隔的发射之间计算相关性，例如通过使点火1和3,2和4,3和5相关，等等。

    Method for detecting two-dimensional flow for ultrasound color flow imaging
    5.
    发明授权
    Method for detecting two-dimensional flow for ultrasound color flow imaging 失效
    用于检测超声彩色流动成像二维流的方法

    公开(公告)号：US5398216A

    公开(公告)日：1995-03-14

    申请号：US113003

    申请日：1993-08-30

    申请人： Anne L. Hall ,  Richard B. Bernardi

    发明人： Anne L. Hall ,  Richard B. Bernardi

    IPC分类号： G01F1/66 ,  G01P5/00 ,  G01S15/89 ,  A61B8/06

    CPC分类号： G01P5/001 ,  G01F1/663 ,  G01S15/8913 ,  G01S15/8918 ,  G01S15/8984

    摘要： A triangulation method and apparatus for measuring the velocity of a flowing material at a point of interest along two lines of sight which have different vector components. The flow velocity along two different image vectors is measured simultaneously by separately processing the signals from left and right reception apertures (14, 16). In one case, the positions of the reception apertures are held constant and conventional dynamic focussing on receive is used to steer the apertures to follow the transmitted energy as a function of range depth. In an alternative case, the transducers included in each reception aperture are dynamically reassigned in order to maintain a fixed triangulation angle. In this case a reception aperture shifts away from the transmission aperture (12) to track the received backscattered ultrasonic energy at a constant triangulation angle.

    摘要翻译： 一种用于测量沿着具有不同矢量分量的两条视线的感兴趣点处的流动材料的速度的三角测量方法和装置。 通过分别处理来自左和右接收孔（14,16）的信号同时测量沿着两个不同图像矢量的流速。 在一种情况下，接收孔径的位置保持恒定，并且常规地将接收的动态聚焦用于引导孔径作为距离深度的函数来跟随传输的能量。 在替代情况下，包括在每个接收孔径中的换能器被动态地重新分配，以便保持固定的三角测角。 在这种情况下，接收孔径从传输孔径（12）移开，以以恒定的三角测量角度跟踪接收的反向散射的超声波能量。

    Method for controlling adaptive color flow processing using fuzzy logic
    7.
    发明授权
    Method for controlling adaptive color flow processing using fuzzy logic 失效
    使用模糊逻辑控制自适应色彩流处理的方法

    公开(公告)号：US5357965A

    公开(公告)日：1994-10-25

    申请号：US158071

    申请日：1993-11-24

    申请人： Anne L. Hall ,  Michael J. Harsh

    发明人： Anne L. Hall ,  Michael J. Harsh

    IPC分类号： G01S7/52 ,  G01S15/89 ,  A61B8/00

    CPC分类号： G01S7/52071 ,  G01S15/8981

    摘要： A color flow processor has a fuzzy logic processor for determining when an adaptive wall filter can be turned off in response to the condition wherein flow signal will be treated as wall signal. The fuzzy logic processor uses details of wall velocity and power, as well as variance, to determine whether the measured echo signal component to be filtered truly represents the wall velocity only. The general rule applied by the fuzzy logic processor would be that if the wall velocity is LOW and the wall variance is LOW and the wall power is HIGH, than the adaptive filter is turned ON, where LOW and HIGH are fuzzy values. Use can be made of information from previous states, either temporally or spatially, allowing the system to adapt itself to each study or over time.

    摘要翻译： 色流处理器具有模糊逻辑处理器，用于响应于将流量信号视为墙信号的状况来确定自适应壁滤波器何时能够被关闭。 模糊逻辑处理器使用壁速度和功率以及方差的细节来确定被滤波的测量回波信号分量是否真正代表了壁速度。 由模糊逻辑处理器应用的一般规则是，如果壁速度低，壁面方差为低，壁功率为高，则自适应滤波器为ON，其中LOW和HIGH为模糊值。 可以使用来自以前国家的信息，在时间上或空间上，允许系统适应每项研究或随着时间的推移。

    Region-of-interest digital subtraction angiography
    8.
    发明授权
    Region-of-interest digital subtraction angiography 失效
    感兴趣区数字减影血管造影

    公开(公告)号：US4559557A

    公开(公告)日：1985-12-17

    申请号：US616206

    申请日：1984-06-01

    申请人： Gary S. Keyes ,  Barry F. Belanger ,  Anne L. Hall

    发明人： Gary S. Keyes ,  Barry F. Belanger ,  Anne L. Hall

    IPC分类号： A61B6/00 ,  G06F17/00 ,  G06T5/50 ,  G06F15/42 ,  H04N5/32

    CPC分类号： A61B6/482 ,  A61B6/4042 ,  A61B6/481 ,  A61B6/504 ,  G06T5/50 ,  A61B6/4035

    摘要： In digital subtraction angiography a low X-ray energy temporal subtraction image is displayed on a video monitor. Regions in the temporal image frame that contain motion artifacts are outlined by using a cursor. The coordinates of the pixels in the defined outlined region are stored in a processor memory. The data for a related hybrid subtraction image are developed and stored. The processor then effects substitution of the hybrid subtraction image pixels, that fall within the same defined region, into the temporal subtraction image. The combined image data are transferred to a display controller memory which controls display of the combined image on a monitor. A method and means are provided for automatically determining the optimum value of the weighting coefficient applied to the high energy temporal subtraction image that results in the most complete cancellation of everything in the two images except the contrast medium filled blood vessel when the high and low energy temporal images are subtracted. A method and means are provided for altering the gain and offset of the hybrid image data in such manner as to match the hybrid image contrast and brightness with that of the temporal subtraction image.

    摘要翻译： 在数字减影血管造影中，低X射线能量时间减影图像显示在视频监视器上。 通过使用光标来概述包含运动伪影的时间图像帧中的区域。 所定义的区域中的像素的坐标存储在处理器存储器中。 开发和存储相关混合减影图像的数据。 然后，处理器将落在相同的限定区域内的混合减影图像像素替换成时间减影图像。 组合的图像数据被传送到显示控制器存储器，其控制监视器上的组合图像的显示。 提供了一种方法和装置，用于自动确定应用于高能量时间减影图像的加权系数的最佳值，其导致除了造影剂填充血管之外的两个图像中的全部消除，当高和低能量 减去时间图像。 提供一种方法和装置，用于以混合图像对比度和亮度与时间相减图像匹配的方式改变混合图像数据的增益和偏移。

    Ultrasound color flow imaging utilizing a plurality of algorithms
    9.
    发明授权
    Ultrasound color flow imaging utilizing a plurality of algorithms 有权
    使用多种算法的超声彩色流成像

    公开(公告)号：US6110119A

    公开(公告)日：2000-08-29

    申请号：US224013

    申请日：1998-12-31

    申请人： Anne L. Hall

    发明人： Anne L. Hall

    IPC分类号： A61B8/08 ,  A61B8/06 ,  G01S7/52

    CPC分类号： G01S7/52071 ,  A61B8/06 ,  A61B8/13 ,  G01S15/8988 ,  G01S7/52033 ,  G01S7/52034 ,  G01S7/52044 ,  G01S7/52046

    摘要： An ultrasonic imaging system for displaying color flow images includes a receiver which demodulates ultrasonic echo signals received by a transducer array and dynamically focuses the baseband echo signals. A color flow processor includes a plurality of logic units which perform different algorithms based on the type of examination being conducted.

    摘要翻译： 用于显示彩色流图像的超声波成像系统包括：解调由换能器阵列接收的超声回波信号的接收器，并且动态地聚焦基带回波信号。 颜色流处理器包括多个逻辑单元，其基于正在进行的检查的类型执行不同的算法。