Efficient generation of cavitation cloud by dual-frequency ultrasound exposure in optically transparent gel

Jun Yasuda, Ayumu Asai, Shin Yoshizawa, Shin Ichiro Umemura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cavitation bubbles are known to enhance HIFU treatment. To generate them at a high efficiency, ultrasound waveforms emphasizing either positive or negative pressure were synthesized by superimposing the second harmonic onto the fundamental and combined in an exposure sequence. In this study, four different types of sequences were compared. Negative-pressure emphasized waves immediately followed by positive-pressure emphasized waves resulted in the highest efficiency. The pressure-release surfaces provided by the cavitation bubbles generated by the former waves may have converted the latter waves to highly negative-pressure emphasized waves.

Original languageEnglish
Title of host publication2012 IEEE International Ultrasonics Symposium, IUS 2012
Pages2607-2610
Number of pages4
DOIs
Publication statusPublished - 2012 Dec 1
Event2012 IEEE International Ultrasonics Symposium, IUS 2012 - Dresden, Germany
Duration: 2012 Oct 72012 Oct 10

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Other

Other2012 IEEE International Ultrasonics Symposium, IUS 2012
Country/TerritoryGermany
CityDresden
Period12/10/712/10/10

Keywords

  • cavitation enhanced heating
  • dual-frequency ultrasound exposure
  • high-speed imaging

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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