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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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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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Computed Tomography01:10

Computed Tomography

8.0K
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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相关实验视频

Updated: Jan 12, 2026

Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
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Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System

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使用相不敏感的超声波计算机断层扫描系统进行定量声学减弱扫描.

Daniel Sarno, Christian Baker, Bajram Zeqiri

    IEEE transactions on ultrasonics, ferroelectrics, and frequency control
    |November 7, 2025
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    概括
    此摘要是机器生成的。

    一个新的定量超声波计算机断层扫描 (Q-UCT) 系统准确地绘制了乳腺组织衰减,可能减少癌症查中的错误阳性结果. 这种新型扫描仪显示出改善诊断准确性和患者结果的前景.

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    Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization

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    相关实验视频

    Last Updated: Jan 12, 2026

    Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
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    Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System

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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.
    • 声学 声学 在声学方面

    背景情况:

    • 乳腺癌查中的假阳性结果导致患者的痛苦和医疗保健的低效.
    • 定量超声波 (QUS) 提供了一种测量内在声学特性以提高临床决策的方法.

    研究的目的:

    • 描述一种新型相位不敏感的超声波计算机断层扫描 (Q-UCT) 扫描仪的性能.
    • 评估系统对乳腺组织定量声衰减系数映射的能力.

    主要方法:

    • 用新的Q-UCT系统对人类形状的乳房幽灵进行了扫描.
    • 结果与X射线计算机断层扫描 (XCT) 和地面真相减弱测量结果进行了比较.
    • 评估了系统检测小插件和测量衰减系数的能力.

    主要成果:

    • Q-UCT系统成功检测到直径仅为4毫米的插件.
    • 对各种材料进行了精确的内在衰减系数 (0.74.1 dB cm−1 在3.2 MHz) 的测量.
    • 对宿主材料的测量显示,在基础真实值的扩展不确定性范围内,存在一致性.

    结论:

    • 新型相位不敏感的Q-UCT系统证明了对乳腺组织定量声衰减映射的可靠性能.
    • 这项技术有可能提高乳腺癌查的准确性,减少假阳性结果.
    • 进一步开发可能会导致更有效和更少负担的诊断工具.