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相关概念视频

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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长方形稀疏阵列具有相同的发送接收元件数量用于3D超声波成像.

Heechul Yoon1, Sua Bae2, Jae Song3

  • 1Department of Electronics and Electrical Engineering, Dankook University, Yongin-si, Gyeonggi-do 16890, South Korea.

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概括

这项研究引入了一种用于二维超声成像的新型确定性稀疏阵列设计,使得传输和接收元素数量相同. 这一创新简化了系统要求,并保持了体积成像的光束图案质量.

关键词:
这是一个二维矩阵阵列.网格叶片 网格叶片 网格叶片长方形的稀疏阵列是一个矩形.一个稀疏的数组阵列.卷度成像成像技术的使用.

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科学领域:

  • 超声波成像 超声波成像
  • 阵列信号处理系统的信号处理.
  • 医学成像技术 医学成像技术

背景情况:

  • 二维 (2D) 阵列为3D体积超声波成像提供动态聚焦和方向.
  • 在二维数组中,高元素数量带来了成本和系统复杂性的挑战.
  • 现有的稀疏阵列设计往往导致不平等的发送和接收元素数量,需要定制的系统.

研究的目的:

  • 为2D超声波阵列提出一种新的确定性稀疏阵列设计方法.
  • 为了使发射和接收阵列具有相同数量的活性元件的设计.
  • 为了克服超声成像中自定义系统要求的局限性.

主要方法:

  • 开发了一个确定性的稀疏阵列设计,该设计基于对直角1D稀疏模式,应用于x和y轴.
  • 应用一个1-D模式到x轴和另一个到y轴的传输阵列.
  • 逆转了对接收阵列的这些1D模式的应用,以实现相同的元素计数.

主要成果:

  • 通过使用新方法成功设计了两个稀疏数组,具有相同的发送和接收元素数量.
  • 设计的阵列基于64x64和64x32的足迹.
  • 通过模拟来评估性能,并与以前的方法和完全采样的数组进行比较.

结论:

  • 提出的决定性设计方法有效地产生具有匹配元素数量的二维稀疏数组.
  • 这种方法通过消除对定制通道配置的需求,简化了超声波系统设计.
  • 该方法对具有成本效益和高效的体积超声波成像具有前景.