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    Continuous display of peak and mean blood flow velocities
    2.
    发明公开
    Continuous display of peak and mean blood flow velocities 失效
    StändigeAnzeige der spitzen- und der mittlerenBlutströmungsgeschwindigkeit。

    公开(公告)号：EP0573249A1

    公开(公告)日：1993-12-08

    申请号：EP93304234.3

    申请日：1993-06-01

    申请人： ADVANCED TECHNOLOGY LABORATORIES, INC.

    发明人： Routh, Helen Frances ,  Peterson, Roy Beck ,  Powrie, Charles Wesley, Jr.

    IPC分类号： G01S7/52 ,  G01S15/50

    CPC分类号： G01S15/58 ,  G01S7/52071

    摘要： A technique for continuously determining and displaying the peak and mean velocities of spectral Doppler information is disclosed. Received spectral Doppler data is examined over a predetermined period to determine the signal to noise ratio of the Doppler signals. Individual instantaneous measurements, or lines, of Doppler spectral information are analyzed in the power versus frequency domain to compare the line information against a noise threshold determined by the signal to noise ratio. The maximum frequency signal component is thereby identified as the peak velocity of the spectral line. Mean velocity is calculated as an intensity weighted mean about the maximum power frequency of the line data. The identified peak and mean velocities are displayed in contrasting colors or shades on a continuously updated and displayed flow velocity versus time spectral display.

    摘要翻译： 公开了一种用于连续地确定和显示频谱多普勒信息的峰值和平均速度的技术。 在预定时间段内检查接收到的频谱多普勒数据，以确定多普勒信号的信噪比。 在功率对频域中分析多普勒频谱信息的单个瞬时测量或线，以将线信息与由信噪比确定的噪声阈值进行比较。 因此，最大频率信号分量被识别为谱线的峰值速度。 平均速度被计算为关于线数据的最大功率频率的强度加权平均值。 识别的峰值和平均速度以对比色或阴影显示在连续更新和显示的流速对时间光谱显示上。