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21. 发明申请

US20070038095A1 ULTRASOUND VIBROMETRY 有权
标题翻译：超声波振动
公开(公告)号：US20070038095A1
公开(公告)日：2007-02-15
申请号：US11536330
申请日：2006-09-28
申请人： James Greenleaf , Shigao Chen
发明人： James Greenleaf , Shigao Chen
IPC分类号： A61B8/00
CPC分类号： A61B8/00 , A61B5/0051 , A61B8/485
摘要： A method for measuring a mechanical property of a subject includes using an ultrasonic transducer to apply ultrasonic vibration pulses to a vibration origin in the subject in an on-off time sequence in order to impart a harmonic motion at a prescribed frequency to the subject, and when the vibration pulses are off, using the same transducer to apply ultrasonic detection pulses to a motion detection point and to receive echo signals therefrom in order to sense the harmonic motion on the subject at the motion detection point. From the harmonic signal information, a harmonic signal is detected and a characteristic such as amplitude or phase of the detected harmonic signal is measured. The mechanical property is calculated using the measured characteristic using for example a wave speed dispersion method.
摘要翻译：用于测量受试者的机械性质的方法包括使用超声波换能器以开关时间顺序将超声波振动脉冲施加到被检体中的振动起点，以向受检者施加规定频率的谐波运动，以及当振动脉冲关闭时，使用相同的换能器将超声波检测脉冲施加到运动检测点并从其接收回波信号，以便感测在运动检测点处的对象上的谐波运动。从谐波信号信息中，检测出谐波信号，并且测量检测到的谐波信号的幅度或相位的特性。使用例如波速色散法的测量特性来计算机械性能。

22. 发明申请

US20050165306A1 Detection of motion in vibro-acoustography 有权
标题翻译：振动声学中的运动检测
公开(公告)号：US20050165306A1
公开(公告)日：2005-07-28
申请号：US10956461
申请日：2004-10-01
申请人： Yi Zheng , Wei Tan , James Greenleaf , Shigao Chen
发明人： Yi Zheng , Wei Tan , James Greenleaf , Shigao Chen
IPC分类号： A61B8/00
CPC分类号： A61B8/00 , A61B8/485
摘要： Harmonic motion is produced in a subject using vibro-acoustography. An ultrasonic imaging system repetitively interrogates the subject and the Doppler shift in the reflected echo signals is analyzed to measure the phase and amplitude of harmonic motion produced in the subject at different prescribed frequencies. Shear wave propagation through the subject is determined from this information and mechanical properties related to “stiffness” of the subject are determined. A Kalman filter is employed in the phase and amplitude measurement to extract the harmonic motion information from background noise.
摘要翻译：使用振动声学技术在受试者中产生谐波运动。超声成像系统重复地询问受试者，并且分析反射回波信号中的多普勒频移，以测量在不同规定频率下在受试者中产生的谐波运动的相位和幅度。根据该信息确定通过受试者的剪切波传播，并确定与受试者的“刚度”相关的机械性质。在相位和幅度测量中采用卡尔曼滤波器从背景噪声中提取谐波运动信息。

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