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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >A parallel tracking method for acoustic radiation force impulse imaging
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A parallel tracking method for acoustic radiation force impulse imaging

机译：声辐射力脉冲成像的并行跟踪方法

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摘要

Radiation force-based techniques have been developed by several groups for imaging the mechanical properties of tissue. Acoustic radiation force impulse (ARFI) imaging is one such method that uses commercially available scanners to generate localized radiation forces in tissue. The response of the tissue to the radiation force is determined using conventional B-mode imaging pulses to track micron-scale displacements in tissue. Current research in ARFI imaging is focused on producing real-time images of tissue displacements arid related mechanical properties. Obstacles to producing a real-time ARFl imaging modality include data acquisition, processing power, data transfer rates, heating of the transducer, and patient safety concerns. We propose a parallel receive beamforming technique to reduce transducer heating and patient acoustic exposure, and to facilitate data acquisition for real-time ARFI imaging. Custom beam sequencing was used with a commercially available scanner to track tissue displacements with parallel-receive beamforming in tissue-mimicking phantoms. Using simulations, the effects of material properties on parallel tracking are observed. Transducer and tissue heating for parallel tracking are compared to standard ARFI beam sequencing. The effects of tracking beam position and size of the tracked region are also discussed in relation to the size and temporal response of the region of applied force, and the impact on ARFI image contrast arid signal-to-noise ratio are quantified
机译：几个小组已经开发了基于辐射力的技术，以对组织的机械性能进行成像。声辐射力脉冲（ARFI）成像就是这样一种方法，它使用可商购的扫描仪在组织中生成局部辐射力。使用常规的B模式成像脉冲来跟踪组织中的微米级位移，从而确定组织对辐射力的响应。 ARFI成像的当前研究集中在产生组织位移及相关机械性能的实时图像。产生实时ARF1成像模态的障碍包括数据采集，处理能力，数据传输速率，换能器的发热以及患者安全问题。我们提出了一种并行接收波束成形技术，以减少换能器发热和患者声波辐射，并促进实时ARFI成像的数据采集。定制光束定序与可商购的扫描仪一起使用，以模仿组织体模的平行接收波束形成跟踪组织位移。使用模拟，可以观察到材料特性对平行跟踪的影响。将用于平行跟踪的换能器和组织加热与标准ARFI光束定序进行了比较。还针对施加力区域的大小和时间响应，讨论了跟踪光束位置和被跟踪区域大小的影响，并量化了对ARFI图像对比度和信噪比的影响

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