Optimization of phase shift of the transducer for high intensity focused ultrasound (HIFU)

Mariko Yamamoto, Shin Yoshizawa, Shin Ichiro Umemura

研究成果: Conference contribution

抄録

A method of beam design for a high-intensity focused ultrasound (HIFU) array transducer, a technology that has recently made significant progress, can be an essential tool to utilize the potential of an HIFU. A method of beam design that constrains the apodization weights of each element based on the least squares method was proposed to meet clinical needs in HIFU therapy in terms of the total power at the focal spot and the suppression of the near-field power density. The difficulty in calculation was solved with orthonormalized maps introduced using a fixed-point theorem. The proposed method was applied to the beamforming design to form a uniform wide beam and a Bessel beam with uniform phase shift as the optimized beam shapes. There was an improvement of approximately 20% in homogeneity and 70% in power efficiency. The proposed method has proven useful in forming a uniform wide beam, and the success of our method suggests its potential usefulness.

本文言語English
ホスト出版物のタイトル2012 IEEE International Ultrasonics Symposium, IUS 2012
ページ1625-1628
ページ数4
DOI
出版ステータスPublished - 2012
イベント2012 IEEE International Ultrasonics Symposium, IUS 2012 - Dresden, Germany
継続期間: 2012 10 72012 10 10

出版物シリーズ

名前IEEE International Ultrasonics Symposium, IUS
ISSN(印刷版)1948-5719
ISSN(電子版)1948-5727

Other

Other2012 IEEE International Ultrasonics Symposium, IUS 2012
国/地域Germany
CityDresden
Period12/10/712/10/10

ASJC Scopus subject areas

  • 音響学および超音波学

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