Enhancement of ultrasonic heating by ultrasonically localized cavitationfor high intensity focused ultrasound treatment

Ryo Takagi, Shin Yoshizawa, Shin Ichiro Umemura

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

Abstract

In our previous study, the new method was suggested to treat the tissueefficiently in high intensity focused ultrasound (HIFU) treatment. We havecalled the method Triggerd HIFU treatment, in which a high intensity burst(named a triggering pulse) was irradiated just before the CW ultrasound (namedheating waves), at an intensity level and with duration, typical forconventional HIFU ablation. In this experiment, the second-harmonic wassuperimposed to the triggering pulse, and the cavitation threshold wasinvestigated by comparing with the case of single frequency exposure throughdetecting the acoustic emission from the bubbles. Cavitating bubbles generatedby the triggering pulse were also observed by high speed imaging during bothexposure experiments. The experimental results show that cavitation bubbles canbe generated more efficiently by the second-harmonic superimposition. The highspeed imaging found that the quantity of the triggered cavitation bubblescorrelated to the 1/2 subharmonic signal amplitude in the acoustic emission fromthe bubbles.

Original languageEnglish
Title of host publication2010 IEEE International Ultrasonics Symposium, IUS 2010
Pages217-220
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 IEEE International Ultrasonics Symposium, IUS 2010 - San Diego, CA, United States
Duration: 2010 Oct 112010 Oct 14

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117

Other

Other2010 IEEE International Ultrasonics Symposium, IUS 2010
CountryUnited States
CitySan Diego, CA
Period10/10/1110/10/14

Keywords

  • cavitation detection
  • cavitation enhanced heating
  • second- harmonicsuperimposition

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Fingerprint Dive into the research topics of 'Enhancement of ultrasonic heating by ultrasonically localized cavitationfor high intensity focused ultrasound treatment'. Together they form a unique fingerprint.

Cite this