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

Ryo Takagi, Shin Yoshizawa, Shin Ichiro Umemura

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトル2010 IEEE International Ultrasonics Symposium, IUS 2010
ページ217-220
ページ数4
DOI
出版ステータスPublished - 2010 12 1
イベント2010 IEEE International Ultrasonics Symposium, IUS 2010 - San Diego, CA, United States
継続期間: 2010 10 112010 10 14

出版物シリーズ

名前Proceedings - IEEE Ultrasonics Symposium
ISSN(印刷版)1051-0117

Other

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

ASJC Scopus subject areas

  • 音響学および超音波学

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