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    Method and apparatus for measuring volume fluid flow
    31.
    发明授权
    Method and apparatus for measuring volume fluid flow 失效
    用于测量体积流体流量的方法和装置

    公开(公告)号：US4807636A

    公开(公告)日：1989-02-28

    申请号：US905742

    申请日：1986-09-09

    申请人： R. Skidmore ,  Jonathan M. Evans

    发明人： R. Skidmore ,  Jonathan M. Evans

    IPC分类号： A61B8/06 ,  G01F1/66 ,  G01S15/58 ,  A61B10/00

    CPC分类号： A61B8/06 ,  G01F1/663 ,  G01S15/582 ,  G01S15/588 ,  G01S15/8984

    摘要： A system is provided for measuring volume blood flow using non-invasive ultrasonic Doppler techniques. This system includes a probe assembly including a transducer having an inner transducer element and a concentric outer transducer element. A wide beam of ultrasonic energy is transmitted using the transducer and is received by a lumen area. Reflected untrasonic energy is returned to the transducer. Both the outer and inner transducer elements of the transducer are used to generate signals representative of a wide beam and a narrow beam. These generated signals include Doppler information. The signals representative of the wide beam are processed simultaneously with signals representative of the narrow beam to produce Doppler power spectrums associated with the wide and narrow beams. Phase quadrature signals are also generated for use in determining the direction of blood flow at the insonified lumen area. An AGC circuit is utilized for controlled amplitude fluctuations in the wide beam Doppler power spectrum. The control signal is also applied to the narrow beam power spectrum to avoid the introduction of inaccuracies in the subsequent computation of the ratio of wide beam power to narrow beam power. A mean frequency estimator circuit is also provided for determining the velocity of the blood flow at the insonified lumen area. The determined flow velocity is applied to a recording device for observation by the operator. The operator relies on the flow velocity trace in ensuring correct placement of the probe assembly for insonifying a desired lumen area. After it has been determined that the probe assembly is properly located, a processing/controlling unit determines volume blood flow by multiplyng the determined flow velocity by the ratio of the obtained powers in the wide and narrow beams.

    摘要翻译： 提供了一种使用非侵入式超声多普勒技术测量体积血流量的系统。 该系统包括探头组件，其包括具有内部换能器元件和同心外部换能器元件的换能器。 使用换能器传播超大波能量的大波束，并被管腔区域接收。 反射的非共振能量返回到换能器。 换能器的外换能器元件和内换能器元件都用于产生表示宽光束和窄光束的信号。 这些产生的信号包括多普勒信息。 表示宽波束的信号与表示窄波束的信号同时处理，以产生与宽波束和窄波束相关联的多普勒功率谱。 也产生相位正交信号，用于确定在扩散的管腔区域处的血流的方向。 AGC电路用于宽波束多普勒功率谱中的受控幅度波动。 控制信号也适用于窄波束功率谱，以避免随后计算宽波束功率与窄波束功率之比的不准确性。 还提供了一个平均频率估计器电路，用于确定在加密腔内区域的血流速度。 将确定的流速施加到记录装置，以供操作员观察。 操作者依靠流速迹线确保探针组件的正确放置以使所需的管腔区域松散。 在确定探针组件正确定位之后，处理/控制单元通过将所确定的流速乘以宽和窄波束中获得的功率的比来确定体积血流量。

    Ultrasonic doppler diagnostic apparatus
    32.
    发明授权
    Ultrasonic doppler diagnostic apparatus 失效
    超声多普勒诊断仪

    公开(公告)号：US4759375A

    公开(公告)日：1988-07-26

    申请号：US947027

    申请日：1986-12-22

    申请人： Kouroku Namekawa

    发明人： Kouroku Namekawa

    IPC分类号： G01S15/58 ,  G01S15/89 ,  A61B10/00

    CPC分类号： G01S15/8984 ,  G01S15/582

    摘要： An ultrasonic Doppler diagnostic apparatus usable for ultrasonic image diagnostics accurately determines and displays the velocity of moving reflective members within a subject under observation by transmitting an ultrasonic beam into the subject and receiving the echoes reflected by the moving reflective members. The apparatus comprises a memory for storing a first velocity distribution obtained from a first signal received from a given direction, and a tangential velocity calculator for calculating a tangential velocity distribution in a direction tangential to an arc of a scanned sector by comparing said first velocity distribution within a second velocity distribution obtained from a second signal received from a direction deflected by a small angle with respect to the direction of the first signal. When the apparatus is to be adapted for determining velocity by the autocorrelation method, it is provided with a memory for storing a first autocorrelation signal output by an autocorrelator and a tangential velocity calculator for calculating the tangential velocity distribution from the first autocorrelation and a second autocorrelation having a slightly different angle of deflection.The vectorial velocity of the moving reflective body is determined from the tangential velocity obtained by the tangential velocity calculator so that it is easily possible to obtain accurate velocity information including movement direction information with respect to the moving reflective member without need of transmitting ultrasonic beams from two separated locations. The apparatus thus provides accurate and useful information for use in image diagnostics.

    摘要翻译： 可用于超声波图像诊断的超声多普勒诊断装置通过将超声波束发射到对象中并且接收由移动反射构件反射的回波来精确地确定并显示观察对象内的移动反射构件的速度。 该装置包括存储器，用于存储从从给定方向接收的第一信号获得的第一速度分布;以及切向速度计算器，用于通过比较所述第一速度分布来计算与扫描扇区的弧相切的方向上的切向速度分布 在从相对于第一信号的方向偏转小角度的方向接收的第二信号获得的第二速度分布内。 当该装置适于通过自相关方法确定速度时，其具有存储器，用于存储由自相关器输出的第一自相关信号和切向速度计算器，用于根据第一自相关和第二自相关计算切向速度分布 具有稍微不同的偏转角度。 移动反射体的矢量速度由切向速度计算器求得的切向速度确定，从而可以很容易地获得包括关于移动反射部件的运动方向信息的精确的速度信息，而不需要从两个传送超声波束 分开的位置。 因此，该装置提供用于图像诊断的准确和有用的信息。

    Transverse Oscillation Vector Estimation in Ultrasound Imaging
    36.
    发明申请
    Transverse Oscillation Vector Estimation in Ultrasound Imaging 审中-公开

    公开(公告)号：US20170245833A1

    公开(公告)日：2017-08-31

    申请号：US15054339

    申请日：2016-02-26

    申请人： B-K Medical Aps

    发明人： Jorgen Jensen

    IPC分类号： A61B8/08 ,  A61B8/06 ,  A61B8/00 ,  G01S7/52 ,  A61B8/14

    CPC分类号： A61B8/5223 ,  A61B8/06 ,  A61B8/463 ,  A61B8/5207 ,  G01S7/52042 ,  G01S15/8927 ,  G01S15/8984 ,  G01S15/8993

    摘要： A method includes continuously transmitting, with a transducer array, an ultrasound signal in one direction. The method further includes beamforming, with a beamformer, an echo signal received by the transducer array using on a predetermined apodization function. The echo signal is generated in response to an interaction of the ultrasound signal with flowing structure. The method further includes estimating, with a velocity processor, a vector velocity of the flow, including velocity components, as a function of depth and time from the beamformed echo signals using transverse oscillation vector velocity estimation. The method further includes generating, with a measurement processor, a quantitative measurement from the velocity components. The method further includes visually displaying, with a display monitor, the quantitative measurement.

    Velocity estimation for vector flow imaging (VFI) in ultrasound
    39.
    发明授权
    Velocity estimation for vector flow imaging (VFI) in ultrasound 有权

    公开(公告)号：US09517046B2

    公开(公告)日：2016-12-13

    申请号：US14865554

    申请日：2015-09-25

    申请人： Per Haugaard ,  Gert Seerup

    发明人： Per Haugaard ,  Gert Seerup

    IPC分类号： A61B8/00 ,  A61B8/06 ,  G01S15/89

    CPC分类号： A61B8/06 ,  G01S15/8915 ,  G01S15/8984

    摘要： An ultrasound imaging system includes a transducer array, with an array of transducer elements that transmits an ultrasound signal and receives a set of echoes generated in response to the ultrasound signal traversing a flowing structure. The ultrasound imaging system further includes a beamformer that beamforms the set of echoes, generating a beamformed signal. The ultrasound imaging system further includes a pre-processor that performs basebanding, averaging and decimation of the beamformed signal and determines an autocorrelation of the basebanded, averaged and decimated beamformed signal. The ultrasound imaging system further includes a velocity processor that generates an axial velocity component signal and a lateral velocity component signal based on the autocorrelation. The axial and lateral velocity components indicate a direction and a speed of the flowing structure in the field of view.