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基于动态子阵列选择的节能定位和跟踪方法,为植入的医疗器械提供动力,在分散的异质介质中使用超声波.

Anirudh Kumar Parag, Bogdan C Raducanu, Oguz Kaan Erden

    IEEE transactions on biomedical circuits and systems
    |November 4, 2024
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    概括

    这项研究引入了一种节能超声波束成形方法,用于定位可植入医疗器械. 它可以动态选择传感器子阵列,提高功率效率和运动耐受性,以便更好地无线传输电力.

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    科学领域:

    • 生物医学工程 生物医学工程
    • 声学 声学 在声学方面
    • 医疗成像医学成像

    背景情况:

    • 超声波 (美国) 是植入式医疗器械 (IMD) 的一个关键的无线功率传输方法.
    • 外部传感器阵列补丁 (ETAP) 使用光束成形 (BF) 来定位IMD,但功率效率和运动耐受性是挑战.
    • 优化ETAP资源使用对于能源有限的可穿戴补丁和深/浅IMD应用至关重要.

    研究的目的:

    • 开发一种能效的方法来定位毫米大小的IMD,使用ETAP上的动态子数组选择.
    • 提高对IMD移动的耐受性,适应异质介质,而不需要先前的IMD知识.
    • 为了提高IMD基于超声波的无线电力传输的整体功率效率.

    主要方法:

    • 动态选择ETAP子数组,以节能地定位IMD.
    • 通过添加/减去元素来跟踪IMD移动的子数组跟踪.
    • 在MATLAB中使用异质,分散的生物介质进行K波模拟.
    • 实验验证使用3D打印的人类肋骨和无骨幻影.

    主要成果:

    • 拟议的方法实现了显著的能源效率改进:比延迟和总和BF提高10.53X,比不聚焦传输提高14.4X.
    • 动态子阵列选择提高了能量受限可穿戴贴片的功率效率.
    • 追踪机制提高了对IMD运动的耐受性,这些运动是由呼吸和行走引起的.
    • 采样频率为US频率的10X,可以提高对随机噪声的耐受性.

    结论:

    • 提出的节能方法有效地将毫米大小的IMD定位在复杂的介质中.
    • 动态子阵列选择和跟踪为IMD无线电力传输提供了强大而节能的解决方案.
    • 这种方法克服了标准BF方法的局限性,为先进的IMD应用铺平了道路.