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首页> 外文期刊>Japanese journal of applied physics >Thin catheter bending in the direction perpendicular to ultrasound propagation using two-dimensional array transducer
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Thin catheter bending in the direction perpendicular to ultrasound propagation using two-dimensional array transducer

机译：使用二维阵列换能器在垂直于超声传播的方向上弯曲细导管

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摘要

Although we have already experimented on the bending of a thin catheter with acoustic radiation force using a single transducer, it is necessary to develop a method of bending a catheter in an arbitrary direction because the installation position of ultrasound transducers on a body surface is limited for application to various shapes of in vivo blood vessels. Therefore, we examined the bending of a thin catheter in the direction perpendicular to ultrasound propagation using a two-dimensional array transducer (1 MHz), which realizes not only the temporospatial design but also the dynamic variation of acoustic fields. Forming two focal points with opposite phases, where the amplitudes of the two points instantaneously have the positive and negative relationship, we confirmed the bending of a thin catheter in the direction perpendicular to ultrasound propagation. We used a thin catheter (diameter, 200 mu m; length, 50mm) to obtain the maximum displacement of 220 mu m, where the displacement was proportional to the square of the maximum sound pressure and the duty ratio. From these results, the acoustic energy densities observed in front of and behind the catheter are dominant for the bending of the thin catheter independent of ultrasound propagation. We also found that the distance between two focal points may improve the bending performance without requiring a precise position setting. (C) 2017 The Japan Society of Applied Physics
机译：尽管我们已经使用单个换能器对细导管在声辐射力的作用下进行了实验，但是由于超声波换能器在人体表面的安装位置受到限制，因此有必要开发一种在任意方向上弯曲导管的方法。应用于各种形状的体内血管。因此，我们使用二维阵列换能器（1 MHz）在垂直于超声传播的方向上检查了细导管的弯曲，这不仅实现了颞pat设计，还实现了声场的动态变化。形成两个相位相反的焦点，其中两个点的幅度瞬时具有正负关系，我们确认了细导管在垂直于超声传播方向上的弯曲。我们使用细导管（直径200微米，长度50毫米）获得最大位移220微米，该位移与最大声压和占空比的平方成正比。根据这些结果，在导管前和导管后观察到的声能密度是细导管弯曲的主要因素，与超声传播无关。我们还发现，两个焦点之间的距离可以提高弯曲性能，而无需精确的位置设置。 （C）2017日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2017年第7s1期|07JF20.1-07JF20.5|共5页
  • 作者

    Suzuki Toshiya; Mochizuki Takashi; Ushimizu Hidetaka; Miyazawa Shinya; Tsurui Nobuhiro; Masuda Kohji;

  • 作者单位

    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan;

    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan;

    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan;

    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan;

    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan;

    Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan;

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