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1. 发明申请

US20090178483A1 Nonlinear Elastic Imaging With Two-Frequency Elastic Pulse Complexes 审中-公开
标题翻译：具有双频弹性脉冲复合的非线性弹性成像
公开(公告)号：US20090178483A1
公开(公告)日：2009-07-16
申请号：US12351766
申请日：2009-01-09
申请人： Bjorn A.J. ANGELSEN , Rune HANSEN , Tonni F. JOHANSEN , Svein-Erik MASOY , Sven Peter NASHOLM , Thor TANGEN
发明人： Bjorn A.J. ANGELSEN , Rune HANSEN , Tonni F. JOHANSEN , Svein-Erik MASOY , Sven Peter NASHOLM , Thor TANGEN
IPC分类号： G01N29/07
CPC分类号： G01S15/8952 , A61B8/08 , A61B8/485 , G01S7/52022 , G01S7/52038 , G01S7/52049 , G01S7/52077 , G01S7/52095 , G01S15/8929
摘要： Methods and instruments for suppressing multiple scattering noise and extraction of nonlinear scattering components with measurement or imaging of a region of an object with elastic waves, includes transmission of at least two elastic wave pulse complexes towards the region. The pulse complexes include a high frequency (HF) and a low frequency (LF) pulse. The HF pulse is so close to the LF pulse that it observes the modification of the object by the LF pulse at least for a part of the image depth. The frequency and/or amplitude and/or phase of said LF pulse relative to said HF pulse varies for each transmitted pulse complex to nonlinearly manipulate the object elasticity observed by the HF pulse along at least parts of its propagation, and received HF signals are picked up by transducers from at least one of scattered and transmitted components of the transmitted HF pulses. The received HF signals are processed to form measurement or image signals for display. In the process of forming said measurement or image signals, the received HF signals are delay corrected and/or pulse distortion corrected, and combined to form noise suppressed HF signals or nonlinear scattering HF signals.
摘要翻译：用于通过用弹性波测量或成像物体的区域来抑制多个散射噪声和非线性散射分量的提取的方法和仪器包括向该区域传输至少两个弹性波脉冲复合体。脉冲复合物包括高频（HF）和低频（LF）脉冲。 HF脉冲非常接近LF脉冲，其至少对于图像深度的一部分，通过LF脉冲观察对象的修改。所述LF脉冲相对于所述HF脉冲的频率和/或幅度和/或相位对于每个发送的脉冲复合变化，以非线性地操纵沿其传播的至少部分的HF脉冲观察到的对象弹性，并且接收的HF信号被拾取由发射的HF脉冲的散射和透射分量中的至少一个由换能器提升。所接收的HF信号被处理以形成用于显示的测量或图像信号。在形成所述测量或图像信号的过程中，所接收的HF信号经过延迟校正和/或校正了脉冲失真，并被组合以形成抑制噪声的HF信号或非线性散射HF信号。

2. 发明申请

US20100036244A1 Nonlinear Elastic Wave Measurement and Imaging with Two-Frequency Elastic Wave Pulse Complexes 有权
标题翻译：具有双频弹性波脉冲复合的非线性弹性波测量和成像
公开(公告)号：US20100036244A1
公开(公告)日：2010-02-11
申请号：US12500518
申请日：2009-07-09
申请人： Bjørn A.J. Angelsen , Rune Hansen , Tonni F. Johansen , Svein-Erik Masøy , Sven Peter Nasholm , Thor Tangen
发明人： Bjørn A.J. Angelsen , Rune Hansen , Tonni F. Johansen , Svein-Erik Masøy , Sven Peter Nasholm , Thor Tangen
IPC分类号： A61B8/00
CPC分类号： A61B8/08 , A61B8/485 , G01S7/52022 , G01S7/52038 , G01S7/52049 , G01S7/52077 , G01S7/52095 , G01S15/8929 , G01S15/8952
摘要： Methods and instruments for suppression of multiple scattering noise and extraction of nonlinear scattering components with measurement or imaging of a region of an object with elastic waves, where elastic wave pulse complexes are transmitted towards said region where said pulse complexes are composed of a high frequency (HF) and a low frequency (LF) pulse with the same or overlapping beam directions and where the HF pulse is so close to the LF pulse that it observes the modification of the object by the LF pulse at least for a part of the image depth. The frequency and/or amplitude and/or phase of said LF pulse relative to said HF pulse varies for transmitted pulse complexes in order to nonlinearly manipulate the object elasticity observed by the HF pulse along at least parts of its propagation, and where received HF signals are picked up by transducers from one or both of scattered and transmitted components of the transmitted HF pulses. Said received HF signals are processed to form measurement or image signals for display, and where in the process of forming said measurement or image signals said received HF signals are one or both of delay corrected with correction delay in the fast time (depth-time), and pulse distortion corrected in the fast time, and combined in slow time to form noise suppressed HF signals or nonlinear scattering HF signals that are used for further processing to form measurement or image signals. The methods are applicable to elastic waves where the material elasticity is nonlinear in relation to the material deformation.
摘要翻译：用于抑制多个散射噪声的方法和仪器，并且通过用弹性波测量或成像物体的区域来提取非线性散射分量，其中弹性波脉冲复合物被传输到所述脉冲复合体由高频组成的区域（ HF）和具有相同或重叠的波束方向的低频（LF）脉冲，并且其中HF脉冲如此接近LF脉冲，其至少对于图像深度的一部分通过LF脉冲观察对象的修改。所述LF脉冲相对于所述HF脉冲的频率和/或幅度和/或相位对于传输的脉冲复合体而变化，以便非线性地操纵HF脉冲沿其传播的至少部分观察到的物体弹性，并且其中接收的HF信号由发射的HF脉冲的散射和透射分量中的一个或两个的换能器拾取。所接收的HF信号被处理以形成用于显示的测量或图像信号，并且在形成所述测量或图像信号的过程中，所述接收的HF信号是在快速时间（深度时间）中用修正延迟校正的延迟中的一个或两个，并且在快速时间中校正脉冲失真，并且在慢时间组合以形成用于进一步处理以形成测量或图像信号的噪声抑制HF信号或非线性散射HF信号。该方法适用于材料弹性相对于材料变形非线性的弹性波。

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