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相关概念视频

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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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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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

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An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
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增加超声波视野,减少元素数数组,包含大元素.

Mick Gardner, Rita J Miller, Michael L Oelze

    ArXiv
    |February 27, 2026
    PubMed
    概括

    这项研究通过增加元素大小而不是元素数量来增强医学超声波成像视野 (FOV). 像最小变异 (MV) 这样的高级光束造型器可以提高分辨率,这对于更好的诊断成像至关重要.

    科学领域:

    • 医疗成像医学成像
    • 超声波技术 超声波技术 超声波技术
    • 声学工程 声学工程

    背景情况:

    • 医疗超声波应用通常需要更大的成像视野 (FOV).
    • 目前的线性阵列探测器受限于FOV扩展的元素数量.
    • 增加元素大小提供了一种替代方法来增强FOV.

    研究的目的:

    • 通过增加元素大小来研究增加线性阵列探针的FOV.
    • 分析元素合对阵列光束模式和图像质量的影响.
    • 评估使用更大的元素进行分辨率恢复的先进光束成形技术.

    主要方法:

    • 利用合元件来模拟更大的元件大小.
    • 使用富里埃转换检查了数组光束模式.
    • 使用平面波复合获得幻影和体内 (子瘤) 图像.
    • 使用定位系统进行虚拟大光圈数据采集 (120毫米FOV).
    • 研究的零减法成像 (NSI),信号一致性因子 (SCF) 和最小方差 (MV) 束形造型器.

    主要成果:

    • 分析了元素合对光束模式的影响.
    • 图像质量指标 (分辨率,对比度,斑点SNR) 被评估.

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  • MV光束制造器显示出优异的分辨率改进 (0.78毫米至0.54毫米FWHM),而不会增加斑点变异.
  • MV光束成型有效地弥补了由于更大的元素增加F数而导致的分辨率损失.

    • 结论:

    • 增加元素大小是扩大超声波FOV的可行策略.
    • 先进的光束造型器,特别是MV,对于使用更大的元素保持和改进图像分辨率至关重要.
    • 这种方法有可能提高医学超声波的诊断能力.