Method and system for making blood flow visible
    4.
    发明授权
    Method and system for making blood flow visible 失效
    用于制造血液流动性的方法和系统

    公开(公告)号:US5105816A

    公开(公告)日:1992-04-21

    申请号:US525054

    申请日:1990-05-18

    IPC分类号: A61B5/0285 A61B8/06 G06F17/00

    CPC分类号: A61B8/06

    摘要: A method and system for making visible a flow of blood in a living body. The method comprises the steps of obtaining blood flow vector distribution maps by a recpetion of waves reflected from a living body to which ultrasonic pulses are radiated, and by a Doppler analysis of the reflected waves, arranging dummy blood corpuscle in domains in which the blood flow vector distribution maps are expressed, calculating flow velocity vector of the dummy blood corpuscle for each dummy blood corpuscle from the blood flow vector distribution maps, forming a plurality of images in which the dummy blood corpuscles are sequentially moved in response to the flow velocity vectors, and sequentially displaying the plurality of the images on a display. Also, the density of the arrangement of the dummy blood corpuscles, for example, corresponds to the blood pressure.

    Ultrasonic color doppler diagnostic apparatus
    5.
    发明授权
    Ultrasonic color doppler diagnostic apparatus 失效
    超声波彩色多普勒诊断仪

    公开(公告)号:US5215093A

    公开(公告)日:1993-06-01

    申请号:US786888

    申请日:1991-11-01

    摘要: An ultrasonic color Doppler diagnostic apparatus for displaying at least two successive frames of original images of the two-dimensional images obtained for each ultrasonic interframe time, to find and display a natural interpolated image. The apparatus includes a shape parameter calculating unit which calculates the shape parameters characterizing the shape of a blood flow region on the original images and, a shape parameter interpolating unit which calculates the shape parameters interpolated at a designated timing designated in the interframe time from the shape parameters, the interframe time. In addition and the designated timing, an image converting unit is provided which converts the image of at least one frame of the original image in the plurality of original images in accordance with the shape parameters at a designated timing found by the shape parameter interpolating means to obtain the interpolated image. Further, displaying means is included which displays a moving image comprised of the interpolated images inserted between the original images and moving images of only the interpolated images.

    Apparatus for measuring the characteristics of an ultrasonic wave medium
    7.
    发明授权
    Apparatus for measuring the characteristics of an ultrasonic wave medium 失效
    用于测量超声波介质特性的装置

    公开(公告)号:US4648276A

    公开(公告)日:1987-03-10

    申请号:US616472

    申请日:1984-06-01

    IPC分类号: G01S7/52 G01S15/89 G01N29/00

    摘要: The present invention relates to an apparatus which determines the distribution of the attenuation slope coefficient on a real-time basis using the center frequency shift. In one embodiment, the phase difference between a received signal and a reference signal is determined using EXCLUSIVE OR gates or an inverse trigonometric relation stored in a ROM. The phase difference is input to a differentiator which outputs the center frequency shift of the received signal on a real-time basis. The center frequency shift is input to another differentiator which outputs the attenuation slope coefficient. In other embodiments, the received signal is distributed into received signal bands, having different center frequencies, and signal characteristics of the received signal bands are averaged to remove virtually all effects of spectrum scalloping in the time domain. Thus, the attenuation slope coefficient is obtained without the effects of spectrum scalloping using simple hardware and without Fourier transformation.

    摘要翻译: 本发明涉及使用中心频移来实时地确定衰减斜率系数的分布的装置。 在一个实施例中,接收信号和参考信号之间的相位差是使用存储在ROM中的独占或门或逆三角关系来确定的。 相位差被输入到实时地输出接收信号的中心频移的微分器。 中心频移被输入到输出衰减斜率系数的另一个微分器。 在其他实施例中,接收的信号被分配到具有不同中心频率的接收信号频带中,并且接收信号频带的信号特性被平均以消除时域中的频谱扇贝的几乎所有的影响。 因此,衰减斜率系数在没有使用简单的硬件并且没有傅立叶变换的频谱扇贝的影响下获得。

    Apparatus for characterizing ultrasonic medium
    10.
    发明授权
    Apparatus for characterizing ultrasonic medium 失效
    用于表征超声介质的装置

    公开(公告)号:US4757715A

    公开(公告)日:1988-07-19

    申请号:US16472

    申请日:1987-02-17

    摘要: The present invention relates to a signal processing apparatus for quantitatively measuring ultrasonic characteristics of a medium, such as a human body and realizes the high speed quantitative measurement by processing all signals in the time domain. In the processing for eliminating an error, produced by a degree of convergence of the ultrasonic beam, a correcting function that is a function of the depth and frequency is employed. The correcting function is measured in a no-attenuation medium and converted into a form suited to the time domain processing. The function is stored and such frequency characteristics of the function are sequentially read during an actual medium measurement to control the characteristic of a variable characteristic filter to correct the received signal.

    摘要翻译: 本发明涉及一种用于定量测量诸如人体之类的介质的超声波特性的信号处理装置,并通过处理时域中的所有信号来实现高速定量测量。 在消除由超声波束的收敛程度产生的误差的处理中,采用作为深度和频率的函数的校正函数。 校正功能在无衰减介质中测量并转换为适合于时域处理的形式。 存储该功能,并且在实际介质测量期间依次读取功能的这种频率特性,以控制可变特征滤波器的特性以校正接收的信号。