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Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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Ultrasonography01:17

Ultrasonography

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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 II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
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相关实验视频

Updated: Jul 20, 2025

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
09:02

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

550

非线性超声波成像用于孔隙性评估.

Mario Emanuele De Simone1, Salvatore Boccardi1, Gian Piero Malfense Fierro2

  • 1Department Aeronautics and Astronautics, University of Southampton, Southampton SO17 1BJ, UK.

Sensors (Basel, Switzerland)
|July 29, 2023
PubMed
概括

这项研究引入了两种非线性超声波成像方法,以准确检测和量化复合材料中的多孔性. 这些技术为质量控制和预测材料性能提供了一种敏感的,非破坏性的方法.

科学领域:

  • 材料科学 材料科学 材料科学
  • 非破坏性测试 不破坏性测试
  • 复合材料 复合材料 复合材料

背景情况:

  • 孔隙性显著影响复合板材的机械行为和使用寿命.
  • 准确评估孔隙性对于质量控制和材料性能预测至关重要.
  • 非线性超声波提供高灵敏度检测小缺陷,如毛孔.

研究的目的:

  • 开发和介绍一种先进的成像方法,用于可视化复合材料中的多孔性场.
  • 评估两个新型的非线性超声波技术的有效性,以评估孔隙性.

主要方法:

  • 利用非线性超声波技术,使用来自相位阵列系统的反散射信号.
  • 方法1:从微气泡反射中分析半波频率组件.
  • 方法2:计算衰减系数的频率导数,将其与孔径含量相关联.

主要成果:

  • 两种拟议的非线性超声波方法在孔隙性评估中都表现出高准确度,相比传统的C-scan.
  • 减弱系数方法在定义气泡形状方面表现出卓越的准确性,特别是当表面影响最小时.
  • 这些技术成功地在实验复合样本中成像了多孔性场.

结论:

关键词:
衰减减弱化是一种影像成像技术 影像成像技术非线性成像是一种非线性成像.非线性超声波是指非线性超声波.阶段式数组数组是一个阶段式数组数组.多孔性 多孔性超声波超声波是指超声波的使用.

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  • 非线性超声波为复合材料的多孔性成像提供了高度准确和敏感的方法.
  • 开发的方法提高了质量控制,并使在服务条件下更好地预测材料的行为.
  • 这些技术代表了复合材料的非破坏性评估的重大进步.