An ultrasonic transducer focusing ultrasound into a thin waveguide by two elliptical reflectors

• DOI: 10.35848/1882-0786/ad4d3c
• Publication Date: 2024-05-17T22:40:38Z
• Authors: Shoki Ieiri; Kyohei Yamada; Tatsuki Sasamura; Shinsuke Itoh; Takashi Kasashima; Takeshi Morita
• Keywords: ultrasonic transducer; mode conversion; 03 medical and health sciences; 0302 clinical medicine; Physics; QC1-999; minimally invasive treatments

Abstract A high-power ultrasonic transducer for minimally invasive treatments is proposed, capable of treating areas inaccessible by high-intensity focused ultrasound treatments. This employs two elliptical reflectors that efficiently focus waves into a thin waveguide utilizing mode conversion. Additionally, slit structure introduced to suppress wave diffraction, further enhancing the focusing capabilities transducer. Finite element analysis demonstrates proposed achieves an impressive energy density magnification factor 325, with efficiency 24.2 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>%</mml:mo> <mml:mo>.</mml:mo> </mml:math> 3.4 times higher than conventional transducer, Double Parabolic refLector wave-guided Ultrasonic