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相关概念视频

Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

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To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
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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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Special considerations while measuring pulse01:13

Special considerations while measuring pulse

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Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
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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 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: Jul 15, 2025

Ultrasound-based Pulse Wave Velocity Evaluation in Mice
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物理启发的规范脉冲回声定量超声波:使用ADMM高效优化.

Noushin Jafarpisheh, Laura Castaneda-Martinez, Hayley Whitson

    IEEE transactions on ultrasonics, ferroelectrics, and frequency control
    |October 2, 2023
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    概括
    此摘要是机器生成的。

    这项研究引入了一种新的规范化方法,用于脉冲回声定量超声波 (PEQUS),以改善组织微观结构属性估计. 新方法将平均衰减和回散系数 (BSC) 的精度提高到100%.

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    相关实验视频

    Last Updated: Jul 15, 2025

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    A Novel Application of Musculoskeletal Ultrasound Imaging
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    科学领域:

    • 医疗成像医学成像
    • 生物物理学的生物物理.
    • 超声波技术 超声波技术 超声波技术

    背景情况:

    • 脉冲回声定量超声波 (PEQUS) 对于估计组织微观结构特性至关重要,特别是平均衰减和反射散射系数 (BSC).
    • 最近的研究强调了这些PEQUS参数的规范化估计技术.
    • 精确估计衰减和BSC对于医学超声波的诊断和研究应用至关重要.

    研究的目的:

    • 在PEQUS中开发一个改进的规范化估计算法,用于平均衰减和回散系数 (BSC).
    • 将基于物理的规范化术语纳入,以适应衰减和BSC的独特特征.
    • 通过根据频率和深度的信号噪声比 (SNR) 权衡光谱组件来优化估计过程.

    主要方法:

    • 设计了基于物理学的规范化术语:平均衰减 (渐进变化) 的L2规范和BSC (明显变化) 的L1规范.
    • 应用频率和深度依赖权重对功率光谱,由于SNR低,在深层组织中减轻高频组件的权重.
    • 利用乘数的交替方向方法 (ADMM) 进行高效的成本函数优化.

    主要成果:

    • 拟议的算法显著提高了平均衰减和BSC的估计准确性.
    • 定性和定量评估表明,偏差和差异减少的实质性改进.
    • 与现有技术相比,该方法在估计平均衰减和BSC方面取得了高达100%的改进.

    结论:

    • 新的规范化PEQUS算法在估计组织微观结构性质方面提供了卓越的性能.
    • 物理引导的规范化和基于SNR的权重策略有效地解决了减弱和BSC估计方面的挑战.
    • 这一进步有可能在临床和研究环境中实现更精确的定量超声波成像.