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Plane-wave phase-coherence imaging for NDE

机译：NDE的平面波相位相干成像

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摘要

In ultrasound imaging with arrays the frame rate is limited by the number of insonifications of the inspected medium. In the limit, a single omnidirectional or plane wave insonification (OWI or PWI, respectively) would provide the maximum frame rate. However, since focusing is applied in reception only, this method yields a poor image quality (resolution, SNR, sidelobe levels, etc.). By contrast, multi-insonification techniques, such as the Total Focusing Method (TFM) or Multi-Plane Wave Imaging (M-PWI) provide the highest quality images, although they require more acquisition time. This work tries to achieve the image quality of TFM and M-PWI with a single plane-wave insonification to provide ultra-fast imaging at frame rates of tens of KHz. This is achieved by weighting the plane wave image with a phase coherence factor that keeps in-focus indications and suppresses spurious signals. The bases of the new Plane Wave with Phase Coherence Imaging (PWPCI) are described. Experimental work is also carried out to contrast the image quality with that provided by the well established gold standard TFM. This work demonstrates that the proposed PWPCI technique provides similar or superior image quality than TFM at significantly higher frame rates.
机译：在具有阵列的超声成像中，帧频受检查介质的声化次数限制。在极限情况下，单次全向或平面波声探（分别为OWI或PWI）将提供最大帧速率。但是，由于聚焦仅用于接收，因此此方法会产生较差的图像质量（分辨率，SNR，旁瓣电平等）。相比之下，诸如总聚焦法（TFM）或多平面波成像（M-PWI）之类的多声化技术可提供最高质量的图像，尽管它们需要更多的采集时间。这项工作试图通过单次平面波声波成像来实现TFM和M-PWI的图像质量，从而以数十KHz的帧频提供超快速成像。这可以通过使用相位相干因子对平面波图像进行加权来实现，该相干因子可以保持聚焦指示并抑制虚假信号。描述了具有相干成像的新平面波（PWPCI）的基础。还进行了实验工作，以将图像质量与完善的黄金标准TFM提供的图像质量进行对比。这项工作表明，所提出的PWPCI技术在显着更高的帧速率下提供了与TFM相似或更高的图像质量。

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  • 来源
    《NDT & E international》 |2017年第4期|31-37|共7页
  • 作者

    J.F. Cruza; J. Camacho; C. Fritsch;

  • 作者单位

    Ultrasound Systems and Technology Group (GSTU), Spanish National Research Council (CSIC), Madrid, Spain;

    Ultrasound Systems and Technology Group (GSTU), Spanish National Research Council (CSIC), Madrid, Spain;

    Ultrasound Systems and Technology Group (GSTU), Spanish National Research Council (CSIC), Madrid, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ultrafast imaging; High frame rate; Phase coherence; Plane-wave imaging;

    机译：超快速成像;高帧率;相位相干;平面波成像;

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