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A new synthetic aperture imaging method using virtual elements on both transmit and receive

机译:一种在发射和接收上均使用虚拟元件的新型合成孔径成像方法

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The research for improving the performance of the beamformer in a medical ultrasound imaging system while maintaining the hardware complexity properly has been steadily going on. One example of such research is the synthetic aperture sequential beamforming. This method uses fixed-point receive focusing and all-point transmit focusing through synthetic aperture imaging. Thus, the hardware complexity is greatly reduced in this method, but the performance of this method is similar to that of the conventional B-mode imaging that uses dynamic receive focusing and fixed-point transmit focusing. In this paper, we propose a novel full virtual synthetic aperture imaging method which improves the performance of the synthetic aperture sequential beamforming in terms of the lateral resolution and signal-to-noise ratio. We found that many fixed-point receive focusing blocks working in parallel can be regarded as virtual receive elements and that dynamic receive focusing can be done with these virtual receive elements. We achieve performance improvement by employing this dynamic receive focusing in the proposed method. The efficacy of the proposed method is verified through the Field II simulation.
机译:在适当地保持硬件复杂性的同时,在医学超声成像系统中改善波束形成器性能的研究一直在稳步进行。这种研究的一个例子是合成孔径顺序波束成形。该方法通过合成孔径成像使用定点接收聚焦和全点发射聚焦。因此,该方法大大降低了硬件复杂度,但是该方法的性能类似于使用动态接收聚焦和定点发射聚焦的常规B模式成像。在本文中,我们提出了一种新颖的全虚拟合成孔径成像方法,该方法从横向分辨率和信噪比方面提高了合成孔径顺序波束形成的性能。我们发现,许多并行工作的定点接收聚焦块可被视为虚拟接收元件,而动态接收聚焦可通过这些虚拟接收元件来完成。通过在建议的方法中采用这种动态接收焦点,我们实现了性能改进。通过Field II仿真验证了该方法的有效性。

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