TY - GEN
T1 - Effects of microbubble interaction on occurrence of subharmonics
AU - Kanazawa, S.
AU - Tsuruoka, A.
AU - Sugiura, T.
PY - 2013/12/1
Y1 - 2013/12/1
N2 - Microbubbles insonified by ultrasound show nonlinear oscillation and reflect waves including harmonic and subharmonic signals. Subharmonic imaging can be more useful, though occurrence conditions of subharmonics are not clarified enough. In this study, we investigated effects of microbubble interaction on occurrence of subharmonics. The interaction depends on the distance between two microbubbles and their radius ratios. For different values of these parameters, we numerically calculated the Rayleigh-Plesset equations with these interaction terms added and investigated occurrence conditions of subharmonics. Obtained results show that, by decreasing the distance between the bubbles and increasing the radius of one of the bubbles, the threshold of the pressure amplitude and the transmit frequency for generating subharmonics become lower.
AB - Microbubbles insonified by ultrasound show nonlinear oscillation and reflect waves including harmonic and subharmonic signals. Subharmonic imaging can be more useful, though occurrence conditions of subharmonics are not clarified enough. In this study, we investigated effects of microbubble interaction on occurrence of subharmonics. The interaction depends on the distance between two microbubbles and their radius ratios. For different values of these parameters, we numerically calculated the Rayleigh-Plesset equations with these interaction terms added and investigated occurrence conditions of subharmonics. Obtained results show that, by decreasing the distance between the bubbles and increasing the radius of one of the bubbles, the threshold of the pressure amplitude and the transmit frequency for generating subharmonics become lower.
KW - Bubble interaction
KW - Microbubble
KW - Subharmonic
UR - http://www.scopus.com/inward/record.url?scp=84894327087&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84894327087&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2013.0083
DO - 10.1109/ULTSYM.2013.0083
M3 - Conference contribution
AN - SCOPUS:84894327087
SN - 9781467356862
T3 - IEEE International Ultrasonics Symposium, IUS
SP - 322
EP - 324
BT - 2013 IEEE International Ultrasonics Symposium, IUS 2013
T2 - 2013 IEEE International Ultrasonics Symposium, IUS 2013
Y2 - 21 July 2013 through 25 July 2013
ER -