IEEE Trans Biomed Eng. 2021 Oct;68(10):2965-2973. doi: 10.1109/TBME.2021.3057087. Epub 2021 Sep 20.
To treat tissues that are difficult to access, ultrasound based minimally invasive treatment (MIT) is promising. However, high-power ultrasound delivery through waveguides had been difficult which can increase treatment duration. It is our effort to design the waveguide that can transmit powerful ultrasound.
The waveguide with two parabolic reflectors was proposed by us to produce high-energy-density plane wave. Use of flexible and long thin waveguide was demonstrated here.
Double Parabolic refLectors wave-guided high-power Ultrasonic tranSducer (DPLUS) including a ϕ1 mm ×1 m Nitinol thin waveguide was fabricated. It was shown that high-power ultrasound between 1 to 2 MHz can be propagated through the thin waveguide. Low-loss waveguide material was confirmed to be important to enhance output. As ultrasound is transmitted into working medium, energy mainly flows from the side surface. Temperature of target soft tissue was demonstrated to drastically increase by 10 degree in 30 seconds.
The developed DPLUS makes high-power ultrasound transmission in long and flexible thin waveguide possible.
The concept of DPLUS for delivering high-power ultrasound is powerful in the field of Ultrasonics.
为了治疗难以触及的组织，基于超声波的微创治疗（MIT）很有前景。然而，通过波导传输高功率超声波一直很困难，这会增加治疗时间。我们努力设计能够传输强大超声波的波导。
我们提出了一种带有两个抛物线反射器的波导，以产生高能密度平面波。这里展示了使用灵活的长细波导。
制作了包括ϕ1mm×1m 镍钛诺细波导在内的双抛物线反射器波导高功率超声换能器（DPLUS）。结果表明，1 至 2MHz 的高功率超声波可以通过细波导传播。低损耗波导材料对于提高输出功率很重要。由于超声波在传输过程中进入工作介质，能量主要从侧面流动。目标软组织的温度在 30 秒内急剧升高了 10 度。
开发的 DPLUS 使得在长而灵活的细波导中传输高功率超声波成为可能。
DPLUS 用于传输高功率超声波的概念在超声领域具有强大的影响力。
