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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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Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
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当地区域触觉刺激使用多频空中超声波的干扰.

Saya Mizutani, Shun Suzuki, Atsushi Matsubayashi

    IEEE transactions on haptics
    |June 18, 2024
    PubMed
    概括

    这项研究引入了一种用于空中超声触觉刺激的新方法,使用多个频率来移动焦点而无需相位切换. 这种技术允许连续,稳定的触觉反与高频组件,克服传统方法的局限性.

    科学领域:

    • 触觉学是指触觉学是指触觉学.
    • 声学 声学 在声学方面
    • 人与计算机的交互

    背景情况:

    • 传统的空中超声触觉刺激使用时空调制 (STM) 和侧向调制 (LM) 通过切换传感器相位.
    • 阶段切换限制了焦点运动速度,并导致声压波动,阻碍了稳定的触觉反.

    研究的目的:

    • 提出一种新的横向调制 (LM) 方法,使用多个超声波频率来转移焦点而无需相位切换.
    • 为了实现连续,稳定和高频触觉刺激,减少可听噪声.

    主要方法:

    • 开发了一种多频超声波横向调制 (LM) 方法.
    • 应用的宽带LM覆盖频率高达400Hz.
    • 在指板上研究了高频400Hz的LM.

    主要成果:

    • 拟议的LM方法在没有相位切换的情况下移动超声波焦点,从而实现连续和稳定的运动.
    • 高频400 Hz LM产生了一个直径可比或小于40 kHz超声波波长的一半的刺激区域.
    • 对刺激区域的感知评估显示长轴直径为4.2毫米,短轴直径为3.4毫米.

    结论:

    • 多频超声LM方法有效地克服了触觉刺激中相位切换的局限性.

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  • 这种新方法提供稳定,高频触觉反与精确的空间分辨率,适合先进的人机交互应用.