公开(公告)号：US20070038083A1

公开(公告)日：2007-02-15

申请号：US11202676

申请日：2005-08-12

申请人： Seshadri Srinivasan ,  Bhaskar Ramamurthy ,  Ismayil Guracar ,  Patrick Phillips ,  Rickard Loftman

发明人： Seshadri Srinivasan ,  Bhaskar Ramamurthy ,  Ismayil Guracar ,  Patrick Phillips ,  Rickard Loftman

IPC分类号： A61B8/00

CPC分类号： A61B8/06 ,  A61B8/08 ,  A61B8/488 ,  G01S7/5205 ,  G01S7/52058 ,  G01S15/584

摘要： Velocity scale is automatically determined for ultrasound imaging. Receive signals corresponding to different pulse repetition intervals are used to estimate velocities. The different velocities are used to determine the velocity scale. For example, the different pulse repetition intervals are obtained by selecting different sets of signals from a group of signals for a scan line. As another example, the different pulse repetition intervals are obtained by transmitting for a scan line with changing, such as increasing, pulse repetition intervals. The lower pulse repetition interval of a pair of intervals associated with a sign change in the phase is used for the velocity scale. In yet another example, at least two demodulation frequencies are used for a broadband transmit in at least two sets, each set with a different pulse repetition interval. Velocities are estimated for a greater number of pulse repetition intervals than transmitted using the broadband pulses.

摘要翻译： 自动确定超声波成像的速度刻度。 接收与不同脉冲重复间隔对应的信号用于估算速度。 不同的速度用于确定速度刻度。 例如，通过从扫描线的一组信号中选择不同的信号组来获得不同的脉冲重复间隔。 作为另一示例，通过用改变的脉冲重复间隔等增加扫描线来发送不同的脉冲重复间隔。 与相位中的符号变化相关联的一对间隔的较低脉冲重复间隔用于速度刻度。 在另一个示例中，至少两个解调频率用于至少两组中的宽带传输，每组具有不同的脉冲重复间隔。 对于使用宽带脉冲传输的脉冲重复间隔的数量，估计速度。

公开(公告)号：US20050187476A1

公开(公告)日：2005-08-25

申请号：US10770724

申请日：2004-02-03

申请人： James Chomas ,  Rickard Loftman ,  Constantine Simopoulos

发明人： James Chomas ,  Rickard Loftman ,  Constantine Simopoulos

IPC分类号： A61B8/00 ,  A61B8/14 ,  G01S7/52 ,  G03B42/06

CPC分类号： A61B8/481 ,  G01S7/52033 ,  G01S7/52041 ,  G01S7/5205

摘要： Methods are provided for automatic setting of parameters for contrast agent quantification. Various processes may improve quantification. For example, for consistency in contrast agent quantification, a gain or other setting of an ultrasound system is automatically determined in response to destruction of the contrast agent or at the initiation of the contrast agent quantification procedure. Automatic setting of an adaptive gain provides equalized image intensity for each repetition of a contrast agent quantification procedure based on a same triggering event, the destruction of contrast agent. By synchronizing the adaptive setting algorithms with contrast agent destruction, similar base line information is provided for each iteration of a contrast agent quantification procedure. As another example, the contrast agent gain setting treats acoustic signals representing tissue or other non-contrast agent structure as noise, mapping the tissue values to a substantially constant low value within the dynamic range. As yet another example, by segmenting out blood pools or other areas of contrast agent likely to have contrast agents even after destruction, the resulting gain is more likely sensitive to the detection of perfused contrast agents.

摘要翻译： 提供了用于自动设置造影剂定量参数的方法。 各种过程可以提高定量。 例如，为了对比剂定量的一致性，响应于造影剂的破坏或在造影剂定量程序开始时自动确定超声系统的增益或其他设置。 自适应增益的自动设置为每次重复造影剂定量过程提供了均衡的图像强度，这是基于相同的触发事件，造影剂的破坏。 通过使自适应设置算法与造影剂破坏同步，为造影剂定量过程的每次迭代提供类似的基线信息。 作为另一示例，造影剂增益设置将表示组织或其他非造影剂结构的声学信号视为噪声，将组织值映射到动态范围内的基本上恒定的低值。 作为另一个例子，即使在破坏后，通过分割血液池或可能具有造影剂的造影剂的其它区域，所得到的增益更可能对灌注的造影剂的检测敏感。

公开(公告)号：US20050107699A1

公开(公告)日：2005-05-19

申请号：US10668915

申请日：2003-09-23

申请人： Rickard Loftman ,  Karen Morgan ,  Erkan Mumcuoglu ,  Kutay Ustuner ,  Zoran Banjanin

发明人： Rickard Loftman ,  Karen Morgan ,  Erkan Mumcuoglu ,  Kutay Ustuner ,  Zoran Banjanin

IPC分类号： G01S7/52 ,  G01S15/89 ,  A61B8/00

CPC分类号： G01S15/895 ,  G01S7/52026 ,  G01S7/52046

摘要： Transmit based axial whitening is provided. Ultrasonic waveforms to be transmitted are designed to provide for wideband imaging characteristics prior to detection. Rather than transmitting a waveform having a spectral magnitude as white or flat as possible, waveforms with adjusted spectral content, such as spectrally bi-modal waveforms are generated in order to compensate for subsequent effects. Prior to detection, a more wideband or whiter signal response is provided in response to the transmitted waveform. Any of various alterations of the transmit waveform, such as asymmetric, spectrally bi-modal or other characteristics in anticipation of a system transfer function or physical phenomena through which the signal passes electronically or acoustically to result in a wideband or white spectral magnitude and generally linear spectral phase is used. The transmit waveform is altered to improve the imaging characteristics of the downstream processing.

摘要翻译： 提供基于发射的轴向增白。 要发射的超声波形被设计成在检测之前提供宽带成像特性。 不会发送具有尽可能白色或平坦的光谱幅度的波形，而是产生具有调整的光谱含量（诸如光谱双模态波形）的波形，以便补偿随后的效果。 在检测之前，响应于传输的波形提供更宽带或更白的信号响应。 发射波形的各种改变中的任何一种，例如在预期系统传递函数或物理现象的情况下的不对称，光谱双模式或其他特性，信号通过该物理现象通过电子或声学通过以产生宽带或白色光谱幅度并且通常为线性 使用光谱相位。 改变发射波形以改善下游处理的成像特性。