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首页> 外文会议>SPIE Conference on Ultrasonic Imaging and Tomography >Ultrasound coherence imaging using hardware receive beamforming and broad transmit beams
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Ultrasound coherence imaging using hardware receive beamforming and broad transmit beams

机译：使用硬件的超声相干成像接收波束成形和宽传输波束

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Conventional B-mode ultrasound images suffer from clutter composed of reverberation and aberration that exhibit only partial spatial coherence, making it possible to suppress these confounding signals using coherence- based imaging techniques. Coherence is typically measured by transmitting a focused wave into the tissue and computing the covariance of the returned echo signals across all combinations of receive channel pairs. We mathematically and experimentally prove the equivalence of the coherence measured as a function of transmit channel and as a function of receive channel. This forms the basis for an alternative method of coherence measurement using a synthetic aperture technique to store focused and summed receive channel data as a function of transmit channel. This technique avoids the need for access to individual receive channel data and is compatible with the existing signal pipeline on common commercial clinical scanners. We demonstrate in vivo short-lag spatial coherence imaging of the human liver to produce images with reduced clutter, using an ACUSON SC2000 ultrasound system to acquire data and perform full synthetic aperture focusing. The possibility to trade-off image quality for acquisition time is also presented in an effort to make the proposed sequences more accessible for real-time imaging.
机译：传统的B模式超声图像遭受由混响和像差组成的杂波，其仅具有部分空间相干性，使得可以使用基于相干的成像技术来抑制这些混杂信号。通常通过将聚焦波传输到组织中并计算返回回波信号的协方差在接收信道对的所有组合中来测量相干性。在数学上，通过实验证明作为发送信道的函数和作为接收信道的函数测量的相干性的等价。这形成了使用合成孔技术来存储聚焦测量的替代方法的基础，以将聚焦和总和接收信道数据作为发送信道的函数。该技术避免了对各个接收信道数据访问的需要，并且与公共商业临床扫描仪上的现有信号流水线兼容。我们在人类肝脏的体内短暂滞后空间相干成像中展示了使用ACUSON SC2000超声系统获得减少杂波的图像，以获取数据并执行全合成孔径聚焦。还介绍了用于获取时间的权衡图像质量的可能性，以便使提出的序列更容易获得实时成像。

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