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相关概念视频

Ultrasonography01:17

Ultrasonography

4.4K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Ultrasound I: Abdominal Ultrasonography01:20

Ultrasound I: Abdominal Ultrasonography

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Introduction:
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
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相关实验视频

Updated: Jun 25, 2025

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time
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Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time

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超声波扩散散体波被动阵列成像复杂结构中内部缺陷的复杂结构.

Zhengjun Wang1, Fan Shi1

  • 1Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong Special Administrative Region, China.

Ultrasonics
|May 31, 2024
PubMed
概括

这项研究引入了一种超声波被动阵列成像方法,用于检测轮机叶片等复杂元件的内部缺陷. 该技术使用扩散波和激光振动计进行现场检查,在传统探测器失败的情况下.

科学领域:

  • 非破坏性测试是指非破坏性测试.
  • 超声波传播的超声波传播.
  • 材料科学是一种材料科学.

背景情况:

  • 检查具有复杂几何形状的安全关键部件的缺陷,如轮机叶片,对于传统的超声波方法来说是具有挑战性的.
  • 商业阶段阵列探测器与不规则的外部边界作斗争,限制了现场成像能力.
  • 不规则的组件形状产生分散的弹性波场,可以用于成像.

研究的目的:

  • 开发和评估超声波被动阵列成像方法,用于复杂几何体内的内部缺陷检测.
  • 在不规则的表面上克服传统超声波探针的局限性.
  • 为了利用分散的反响进行高分辨率的地下成像.

主要方法:

  • 使用活性压电驱动器激发弹性扩散波.
  • 扫描激光振动仪在多个点接收分散波.
  • 通过完全聚焦方法被动全矩阵捕获 (FMC) 信号提取和缺陷成像.

主要成果:

  • 成功实施了使用扩散反响的超声波被动阵列成像方法.
  • 数字模拟表明了该方法在缺陷成像方面的潜力.
  • 在轮机叶片状结构上的实验验证证证了成像能力.
关键词:
射线成像阵列的成像复杂的结构结构复杂的结构.扩散场是一个扩散场.激光振动计的激光振动计非破坏性评价 - - 非破坏性评价超声波损伤检测 超声波损伤检测

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Non-invasive Parenchymal, Vascular and Metabolic High-frequency Ultrasound and Photoacoustic Rat Deep Brain Imaging
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Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time
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Non-invasive Parenchymal, Vascular and Metabolic High-frequency Ultrasound and Photoacoustic Rat Deep Brain Imaging
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结论:

  • 建议的超声波被动阵列成像方法对于检查具有复杂外部几何形状的组件中缺陷是有效的.
  • 扩散波场利用为现场检查的传统方法提供了可行的替代方案.
  • 该技术在提高关键组件的安全性和可靠性方面表现有前途.