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    Method and system for generating ultrasound frames with decorrelated speckle patterns and generating a compound ultrasound image therefrom
    6.
    发明授权
    Method and system for generating ultrasound frames with decorrelated speckle patterns and generating a compound ultrasound image therefrom 失效
    用于产生具有解相关散斑图案的超声波帧并从其产生复合超声图像的方法和系统

    公开(公告)号：US06524252B1

    公开(公告)日：2003-02-25

    申请号：US09721889

    申请日：2000-11-24

    申请人： Zengpin Yu ,  Danhua Zhao ,  Shengtz Lin ,  Feng Yin

    发明人： Zengpin Yu ,  Danhua Zhao ,  Shengtz Lin ,  Feng Yin

    IPC分类号： A61B800

    CPC分类号： G01S7/52074 ,  G01S7/52046

    摘要： An ultrasound system that generates compound images from component frames having decorrelated speckle patterns. Successive sets of distinct, speckle-affecting parameters are used to generate successive component frames for compounding, and are selected such that the successive component frames have decorrelated speckle patterns. The speckle-affecting parameters that are changed from frame to frame may be selected from a wide variety of parameters, including transmit beamformer parameters, receive beamformer parameters, and demodulator parameters. According to a preferred embodiment, the successive sets of speckle-affecting parameters differ from each other by at least two speckle-affecting parameters. According to another preferred embodiment, the amount by which each of the multiple speckle-affecting parameters is changed is less than a decorrelation threshold for that parameter, that is, by less that the amount that speckle-affecting parameter alone would be required to change in order to yield decorrelated speckle patterns if no other parameters were changed. When more speckle-affecting parameters are changed, each speckle-affecting parameter can be changed by an amount less than its decorrelation threshold, and yet decorrelated speckle patterns can still be obtained. Moreover, because two different types of speckle-affecting parameters tend to alter the spatial resolution of the component frames in different ways, the spatial resolution of the compounded image can be better as compared to the scenario in which only one speckle-affecting parameter is altered by its decorrelation threshold.

    摘要翻译： 超声系统，其从具有去相关散斑图案的分量帧生成复合图像。 连续的不同的，具有斑点影响的参数被用于生成用于复合的连续分量帧，并且被选择成使得连续分量帧具有去相关的散斑图案。 从帧到帧改变的斑点影响参数可以从各种参数中选择，包括发射波束形成器参数，接收波束形成器参数和解调器参数。 根据优选实施例，连续的斑点影响参数组彼此之间至少有两个斑点影响参数不同。 根据另一个优选实施例，多个斑点影响参数中的每一个改变的量小于该参数的去相关阈值，即，少于仅需要改变斑点影响参数的量 如果没有其他参数被改变，则产生去相关的斑点图案。 当更多的斑点影响参数改变时，每个斑点影响参数可以改变一个小于其去相关阈值的量，然而仍然可以获得去相关的斑点图案。 此外，由于两种不同类型的斑点影响参数倾向于以不同的方式改变分量帧的空间分辨率，所以与仅改变一个斑点影响参数的情况相比，复合图像的空间分辨率可以更好 通过其去相关阈值。