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20 条记录 (耗时 0.048 秒)

    Coherence factor adaptive ultrasound imaging
    11.
    发明申请
    Coherence factor adaptive ultrasound imaging 审中-公开
    相干因子自适应超声成像

    公开(公告)号：US20060173313A1

    公开(公告)日：2006-08-03

    申请号：US11046347

    申请日：2005-01-27

    申请人： D-L Liu ,  Lewis Thomas ,  Kutay Ustuner ,  Charles Bradley ,  John Lazenby

    发明人： D-L Liu ,  Lewis Thomas ,  Kutay Ustuner ,  Charles Bradley ,  John Lazenby

    IPC分类号： A61B8/00

    CPC分类号： G01S7/52046 ,  G01S15/8993

    摘要： A set of N×M signals are acquired from an object, where N is the number of array elements and M corresponds to variations in data acquisition and/or processing parameters. The parameters include transmit aperture functions, transmit waveforms, receive aperture functions, and receive filtering functions in space and/or time. A coherence factor is computed as a ratio of the energy of the coherent sum to the energy of the at-least-partially incoherent sum of channel or image signals acquired with at least one different parameter. Partial beamformed data may be used for channel coherence calculation. For image domain coherence, a component image is formed for each different transmit beam or receive aperture function, and a coherence factor image is computed using the set of component images. The coherence factor image is displayed or used to modify or blend other images formed of the same region.

    摘要翻译： 从对象获取一组NxM信号，其中N是数组元素的数量，M对应于数据采集和/或处理参数中的变化。 这些参数包括发射孔径功能，发射波形，接收孔径功能，以及在空间和/或时间中接收滤波功能。 相干因子被计算为用至少一个不同参数获取的信道或图像信号的至少部分非相干和的相干和的能量与能量的比率。 部分波束形成数据可用于通道相干计算。 对于图像域相干性，为每个不同的发射波束或接收孔径函数形成分量图像，并且使用该组分量图像来计算相干因子图像。 相干因子图像被显示或用于修改或混合由相同区域形成的其他图像。

    Medical ultrasonic diagnostic imaging method and apparatus
    15.
    发明授权
    Medical ultrasonic diagnostic imaging method and apparatus 有权
    医用超声诊断成像方法及装置

    公开(公告)号：US06193659B1

    公开(公告)日：2001-02-27

    申请号：US09282397

    申请日：1999-03-31

    申请人： Bhaskar S. Ramamurthy ,  Charles Bradley ,  Ken Sawatari ,  Danhua Zhao ,  Stuart L. Carp ,  Stirling S. Dodd ,  David J. Hedberg ,  Samuel H. Maslak ,  Daniel E. Need

    发明人： Bhaskar S. Ramamurthy ,  Charles Bradley ,  Ken Sawatari ,  Danhua Zhao ,  Stuart L. Carp ,  Stirling S. Dodd ,  David J. Hedberg ,  Samuel H. Maslak ,  Daniel E. Need

    IPC分类号： A61B800

    CPC分类号： A61B8/481 ,  G01S7/5202 ,  G01S7/52038 ,  G01S15/8915 ,  G01S15/8927 ,  G01S15/895

    摘要： An improvement to the method for harmonic imaging including the steps of (a) transmitting ultrasonic energy at a fundamental frequency and (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency is provided. The transmitting step includes the step of: applying the plurality of waveforms to a respective plurality of transducer elements, a first waveform of the plurality of waveforms characterized by a first value of a harmonic power ratio, waveforms transmitted from the transducer elements and corresponding to the plurality of waveforms summing as an acoustic waveform substantially at the point, the acoustic waveform characterized by a second value of the harmonic power ratio less than the first value. The imaging method can also include a step for subdividing the transmit aperture into two or more subapertures, each subaperture having at least four adjacent transducer elements. The subapertures are phased differently with respect to one another to selectively reduce either fundamental components or harmonic components of echoes from tissue. These techniques can be used to improve contrast agent harmonic imaging as well as tissue harmonic imaging, depending upon the phase shift selected.

    摘要翻译： 提供了一种对谐波成像方法的改进，包括以下步骤：（a）以基频传输超声波能量;（b）在基频谐波处接收反射的超声波能量。 发送步骤包括以下步骤：将多个波形应用于相应的多个换能器元件，所述多个波形的第一波形以谐波功率比的第一值为特征，从换能器元件发送的波形对应于 多个波形基本上在该点处作为声波形求和，声波特征在于小于第一值的谐波功率比的第二值。 成像方法还可以包括将发射孔分成两个或更多个子孔径的步骤，每个子孔径具有至少四个相邻的换能器元件。 子孔径相对于彼此不同地相位选择性地降低来自组织的回波的基本分量或谐波分量。 这些技术可以用于根据选择的相移来改善造影剂谐波成像以及组织谐波成像。

    Ultrasound color flow imaging at high frame rates
    19.
    发明申请
    Ultrasound color flow imaging at high frame rates 有权
    超声波彩色流量成像在高帧速率

    公开(公告)号：US20070078347A1

    公开(公告)日：2007-04-05

    申请号：US11242162

    申请日：2005-09-30

    申请人： Seshadri Srinivasan ,  Patrick Phillips ,  Charles Bradley

    发明人： Seshadri Srinivasan ,  Patrick Phillips ,  Charles Bradley

    IPC分类号： A61B8/14

    CPC分类号： G01S15/584 ,  A61B8/06 ,  A61B8/13 ,  A61B8/54 ,  G01S7/52085 ,  G01S7/5209 ,  G01S7/52092 ,  G01S7/52095 ,  G01S15/8979

    摘要： A method is provided to improve the frame-rate in color-flow ultrasound imaging using simultaneous spatially-distinct transmit beams with one or more frequency bands per transmit beam. Pulses of different center frequencies are used simultaneously in different (lateral and/or elevational) directions, thereby reducing the scanning time and improving the frame-rates. Optionally, a multi-modal pulse is used, and flow is estimated separately for the different frequencies. The flow estimates for these pulses are appropriately combined to improve low-velocity sensitivity and to reduce aliasing. A flow sample count with two or more different pulse repetition intervals can be used to further improve low-flow sensitivity and minimize aliasing.

    摘要翻译： 提供了一种用于使用每个发射波束具有一个或多个频带的同时空间不同的发射波束来改善彩色流超声成像中的帧频的方法。 不同中心频率的脉冲同时在不同（横向和/或正向）方向使用，从而减少扫描时间并提高帧速率。 可选地，使用多模式脉冲，并且针对不同频率分别估计流量。 适当地组合这些脉冲的流量估计以改善低速灵敏度并减少混叠。 可以使用具有两个或多个不同脉冲重复间隔的流量样本计数来进一步改善低流量灵敏度并最小化混叠。

    Medical diagnostic ultrasound transducer system for harmonics
    20.
    发明申请
    Medical diagnostic ultrasound transducer system for harmonics 有权
    医用诊断超声波传感器系统谐波

    公开(公告)号：US20070038082A1

    公开(公告)日：2007-02-15

    申请号：US11192857

    申请日：2005-07-28

    申请人： Jian-Hua Mo ,  Timothy Proulx ,  Charles Bradley

    发明人： Jian-Hua Mo ,  Timothy Proulx ,  Charles Bradley

    IPC分类号： A61B8/00 ,  A61B8/14

    CPC分类号： B06B1/064 ,  G01S7/52038 ,  G01S15/8952

    摘要： A medical diagnostic ultrasound transducer system has at least a first and a second set of transducer layers of an element. Each set has one or more transducer layers with independent electrical access. A transmit event through a first set of transducer layers with broadband electrical signals generates acoustic signals containing at least two different frequency bands, and a receive event through a second and different set of transducer layers receives multiple tissue harmonic signals to generate a wide bandwidth response. Fundamental signals can be reduced with a pulse inversion technique through a second transmit event of inverted pulses, a second receive event and superposition of signals from the two receive events.

    摘要翻译： 医疗诊断超声换能器系统具有元件的至少第一和第二组换能器层。 每组具有一个或多个具有独立电接入的换能器层。 通过具有宽带电信号的第一组换能器层的发射事件产生包含至少两个不同频带的声学信号，并且通过第二和不同组的换能器层的接收事件接收多个组织谐波信号以产生宽带宽响应。 可以通过脉冲反转技术通过反向脉冲的第二发送事件，第二接收事件和来自两个接收事件的信号的叠加来减少基本信号。