Experimental study to produce multiple focal points of acoustic field for active path selection of microbubbles through multi-bifurcation

Ren Koda, Jun Koido, Takumi Ito, Takashi Mochizuki, Kohji Masuda, Seiichi Ikeda, Fumihito Arai, Yoshitaka Miyamoto, Toshio Chiba

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We previously reported our attempt to propel microbubbles in a flow by a primary Bjerknes force, which is a physical phenomenon where an acoustic wave pushes an obstacle along its direction of propagation. However, when ultrasound was emitted from the surface of the body, controlling bubbles in an against-flow was necessary. It is unpractical to use multiple transducers to produce the same number of focal points because single-element transducers cannot produce more than two focal points. In this study, we introduced a complex artificial blood vessel according to a capillary model and a two-dimensional (2D) array transducer to produce multiple focal points for the active control of microbubbles in an against-flow. From the results, about 15% more microbubbles were led to the desired path with multiple focal points of ultrasound relative to the no-emission case.

Original languageEnglish
Article number07HF13
JournalJapanese journal of applied physics
Volume52
Issue number7 PART 2
DOIs
Publication statusPublished - 2013 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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