A New Contrast Echo Imaging Method Using Crossed Beams of Two Ultrasonic Frequencies
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概要
- 論文の詳細を見る
We propose a novel contrast echo imaging method using crossed beams of two different ultrasonic frequencies as an ultrasound method of diagnostic cancer, which we call the crossed beam contrast echo (CBCE) method. The sum or difference frequency components that are derived from the nonlinear oscillation of the microbubbles driven by dual-frequency ultrasound are used in the CBCE method. The blood flow information can only be obtained in the area of the crossed beams, because no sum or difference frequency components are generated by the propagation of biological soft tissues except in the crossed beam area. We discussed the driving conditions under which the sum frequency component is most efficiently generated, and experimentally confirmed the area in which the sum frequency component is generated. As a result, the sum frequency component was larger than the other harmonic components when its frequency was equal to the resonance frequency of the microbubbles. It was confirmed that the area in which the large sum frequency component is generated was equal to the crossing area of the two beams.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-05-25
著者
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Watanabe Yoshiaki
Faculty Of Engineering Doshisha University
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Yoshida Kenji
Faculty Of Engineering Kanagawa University
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Akiyama Iwaki
Department of Electrical and Electronic Media Engineering, Shonan Institute of Technology
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Yoshimato Naoki
Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
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Akiyama Iwaki
Department of Electrical and Electronic Engineering, Shonan Institute of Technology, Fujisawa, Kanagawa 251-8511, Japan
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