Gel phantom containing controlled air to test Triggered HIFU exposure sequence

Kengo Takimoto, Tatsuya Moriyama, Ryo Takagi, Shin Yoshizawa, Shin Ichiro Umemura

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

Abstract

An optically transparent phantom containing a controlled content of air was developed for dosimetry studies of Triggered HIFU (High Intensity Focused Ultrasound) exposure, in which a high intensity short pulse (Triggering Pulse) is used in order to trigger cavitation and enhance the heating effect of an immediately subsequent continuous wave (CW) exposure CW (Heating Waves) with intensity and duration typical of conventional HIFU treatment. The air content was controlled by the time and pressure of degassing during gel formation. We measured the temperature change in the gel with a film thermocouple at the HIFU focus. The temperature rise induced by a 100 μs Triggering Pulse at 10 kW/cm2 of followed by a 10 s CW exposure at 0.2 kW/cm2 was higher than the Heating Waves alone, by up to six to ten times.

Original languageEnglish
Title of host publication10th International Symposium on Therapeutic Ultrasound, ISTU 2010
Pages109-113
Number of pages5
DOIs
Publication statusPublished - 2011 Oct 13
Event10th International Symposium on Therapeutic Ultrasound, ISTU 2010 - Tokyo, Japan
Duration: 2010 Jun 92010 Jun 12

Publication series

NameAIP Conference Proceedings
Volume1359
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other10th International Symposium on Therapeutic Ultrasound, ISTU 2010
CountryJapan
CityTokyo
Period10/6/910/6/12

Keywords

  • Cavitation
  • Gel phantom
  • High Intensity Focused Ultrasound
  • Triggered HIFU

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Takimoto, K., Moriyama, T., Takagi, R., Yoshizawa, S., & Umemura, S. I. (2011). Gel phantom containing controlled air to test Triggered HIFU exposure sequence. In 10th International Symposium on Therapeutic Ultrasound, ISTU 2010 (pp. 109-113). (AIP Conference Proceedings; Vol. 1359). https://doi.org/10.1063/1.3607891