The influence of the insonation conditions of pulsed ultrasound on microbubble volumetric oscillations (On the mechanical index and the oscillation characteristics)

Takeshi Miyamoto, Shin Yoshizawa, Yoichiro Matsumoto

Research output: Contribution to journalArticle

Abstract

The influence of the insonation conditions of short-pulse and low-duty diagnostic ultrasound on the characteristics of microbubble volumetric oscillations in the initial bubble radius range from 0.2 to 2.0 micro meters has been numerically investigated by using a recent single bubble oscillation model. The results show that increasing insonation center frequencies with the constant values of the mechanical index reduces the maximum values of both of the in-bubble temperatures and the bubble-emitted sound pressures; increasing the values of that index with constant center frequencies reduces the resonant bubble radii; the maximum in-bubble temperatures and bubble-emitted pressures are correlated with the normalized minimum bubble radii more significantly than the normalized maximum radii.

Original languageEnglish
Pages (from-to)264-273
Number of pages10
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume77
Issue number774
DOIs
Publication statusPublished - 2011 Dec 1

Keywords

  • Cavitation
  • Diagnosis
  • Mechanical index
  • Microbubble
  • Numerical simulation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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