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    • 10. 发明授权
    • Ultrasonic Doppler flow measurement system with tissue motion
discrimination
    • 超声波多普勒流量测量系统与组织运动辨别
    • US5197477A
    • 1993-03-30
    • US596838
    • 1990-10-12
    • Roy B. PetersonJeffry E. Powers
    • Roy B. PetersonJeffry E. Powers
    • A61B8/06G01F1/66G01P5/00G01P5/24G01S15/52G01S15/58G01S15/89
    • A61B8/06G01F1/663G01P5/241G01S15/52G01S15/582G01S15/8981
    • An ultrasonic diagnostic system for measuring fluid flow velocities through Doppler techniques is provided which eliminates the effects of tissue motion from fluid flow velocity information. In a preferred embodiment Doppler information signal are discriminated to determine the presence of signal components resulting from moving tissue, which signal components are located at frequencies of a Doppler spectrum other than the predetermined frequency location of stationary tissue signals. The tissue motion signal components present are shifted to the predetermined frequency location and removed by high pass filtering the Doppler signals. The remaining signals are then shifted back to their original frequency location and transmitted to a Doppler velocity estimator for further processing of the fluid flow velocity information and ultimate display of the information. To overcome problems of Doppler frequency inaccuracies at discrete spatial positions, the Doppler signals from a plurality of neighboring spatial locations are examined in the aggregate to determine the frequency location of tissue motion signal components.
    • 提供了一种用于通过多普勒技术测量流体流速的超声波诊断系统,其消除了来自流体流速信息的组织运动的影响。 在优选实施例中,多普勒信息信号被识别以确定由移动组织产生的信号分量的存在,该信号分量位于除了静止组织信号的预定频率位置之外的多普勒频谱的频率处。 存在的组织运动信号分量移动到预定频率位置,并通过高通滤波多普勒信号去除。 然后将剩余的信号移回到它们的原始频率位置,并传输到多普勒速度估计器,以进一步处理流体流速信息和信息的最终显示。 为了克服离散空间位置处的多普勒频率不准确的问题,从集合中检查来自多个相邻空间位置的多普勒信号,以确定组织运动信号分量的频率位置。