Analyses of Characteristics of Semi-intermodulated Imaging Based on Multi-Bifrequency Approximation
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概要
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Semi-intermodulated imaging based on low-frequency responses has both advantages and drawbacks. It suffers from limitations under two-frequency approximation when attempting to analyze the characteristics of the total spectrum and when different sized microbubbles are present. We have established the total spectrum for the low-frequency response (including the amplitude and phase terms of each frequency component) under a multi-bifrequency approximation. Our analyses of the effects of the contrast-to-tissue ratio and the use of different parameters in the demodulation process provide an improved understanding of the problems encountered in ultrasound contrast imaging. Moreover, the numerical and experimental results demonstrate that the pulse-inversion technique, as used in second-harmonic imaging, can provide information similar to that provided by semi-intermodulated imaging.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-07-30
著者
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Watanabe Yoshiaki
Faculty Of Engineering Doshisha University
-
Chou Yi-Hong
Department of Radiology, Veterans General Hospital-Taipei, Taipei 112, Taiwan
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Wu Chung-Yuo
Faculty of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
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Chao Wei-Huan
Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 106, Taiwan
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