TY - JOUR
T1 - Experimental study to produce multiple focal points of acoustic field for active path selection of microbubbles through multi-bifurcation
AU - Koda, Ren
AU - Koido, Jun
AU - Ito, Takumi
AU - Mochizuki, Takashi
AU - Masuda, Kohji
AU - Ikeda, Seiichi
AU - Arai, Fumihito
AU - Miyamoto, Yoshitaka
AU - Chiba, Toshio
PY - 2013/7
Y1 - 2013/7
N2 - 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.
AB - 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.
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U2 - 10.7567/JJAP.52.07HF13
DO - 10.7567/JJAP.52.07HF13
M3 - Article
AN - SCOPUS:84881015474
VL - 52
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 7 PART 2
M1 - 07HF13
ER -