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Three-dimensional subharmonic ultrasound imaging in vitro and in vivo

机译：三维子发声超声超声成像体外和体内

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摘要

Rationale and Objectives: Although contrast-enhanced ultrasound imaging techniques such as harmonic imaging (HI) have evolved to reduce tissue signals using the nonlinear properties of the contrast agent, levels of background suppression have been mixed. Subharmonic imaging (SHI) offers near complete tissue suppression by centering the receive bandwidth at half the transmitting frequency. The aims of this study were to demonstrate the feasibility of three-dimensional (3D) SHI and to compare it to 3D HI. Materials and Methods: Three-dimensional HI and SHI were implemented on a Logiq 9 ultrasound scanner with a 4D10L probe. Four-cycle SHI was implemented to transmit at 5.8 MHz and receive at 2.9 MHz, while two-cycle HI was implemented to transmit at 5 MHz and receive at 10 MHz. The ultrasound contrast agent Definity was imaged within a flow phantom and the lower pole of two canine kidneys in both HI and SHI modes. Contrast-to-tissue ratios and rendered images were compared offline. Results: SHI resulted in significant improvement in contrast-to-tissue ratios relative to HI both in vitro (12.11 ± 0.52 vs 2.67 ± 0.77, P < .001) and in vivo (5.74 ± 1.92 vs 2.40 ± 0.48, P = .04). Rendered 3D subharmonic images provided better tissue suppression and a greater overall view of vessels in a flow phantom and canine renal vasculature. Conclusions: The successful implementation of SHI in 3D allows imaging of vascular networks over a heterogeneous sample volume and should improve future diagnostic accuracy. Additionally, 3D SHI provides improved contrast-to-tissue ratios relative to 3D HI.
机译：理由和目的：尽管诸如谐波成像（HI）的对比增强的超声成像技术已经进化以减少使用造影剂的非线性性质的组织信号，但是背景抑制水平已经混合。子发声成像（SHI）通过将接收带宽以发射频率的一半置位，提供近完全组织抑制。本研究的目的是展示三维（3D）SHI的可行性，并将其与3D嗨进行比较。材料和方法：用4D10L探针在LOGIQ 9超声扫描仪上实现三维HI和SHI。实施四周期SHI以在5.8MHz中传输，并在2.9MHz处接收，而两个周期HI被实施以在5MHz处传输并在10 MHz处接收。超声造影剂定义在HI和SHI模式中的两个犬肾的流动虚体和下杆内成像。对比组织比和呈现图像被离线比较。结果：SHI在体外相对于含量的对比度与组织比率有显着改善（12.11±0.52 Vs 2.67±0.77，P <.001）和体内（5.74±1.92 Vs 2.40±0.48，P = .04 ）。渲染3D子发声图像提供了更好的组织抑制和流动虚线和犬肾脉管系统中的血管更大的血管。结论：3D中的SHI成功实施允许在异质样品体积上进行血管网络的成像，并应提高未来的诊断准确性。另外，3D Shi提供了相对于3D Hi的改善的对比度对对比度比。

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  • 来源
    《Academic radiology》 |2012年第6期|共8页
  • 作者

    EisenbreyJ.R.; SridharanA.; MachadoP.; ZhaoH.; HalldorsdottirV.G.; DaveJ.K.; LiuJ.-B.; ParkS.; DianisS.; WallaceK.; ThomeniusK.E.; ForsbergF.;

  • 作者单位

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

    GE Global Research Niskayuna NY United States;

    GE Global Research Niskayuna NY United States;

    GE Global Research Niskayuna NY United States;

    GE Global Research Niskayuna NY United States;

    Department of Radiology Thomas Jefferson University 7 Main Suite 763J 132 South 10th Street;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 放射医学;
  • 关键词

    3D imaging; Contrast-enhanced ultrasound; Subharmonic imaging; Ultrasound contrast agents;

    机译：3D成像;对比度增强超声;次谐成像;超声造影剂;

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