Effects of Nonuniform Acoustic Fields in Vessels and Blood Velocity Profiles on Doppler Power Spectrum and Mean Blood Velocity
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概要
- 論文の詳細を見る
This paper presents a detailed simulation method to estimate Doppler power spectrum and mean blood velocity using real CW Doppler transducers with twin-crystal arrangement. The method is based on dividing the sample volume into small cells and using the statistics of the Doppler power spectrum with the same Doppler shift frequency, which predicts the mean blood velocity. The acoustic fields of semicircular transducers across blood vessels were calculated and the effects of acoustical and physiological factors on Doppler power spectrum and mean blood velocity were analyzed. Results show that nonuniformity of the acoustic field of the ultrasonic beam in the blood vessel and blood velocity profiles significantly affect Doppler power spectrum and mean blood velocity. However, Doppler angle, vessel depth, and sample volume length are not sensitive functions. Comparisons between simulation and experimental results illustrated a good agreement for parabolic flow profile. These results will contribute to a better understanding of Doppler power spectrum and mean blood velocity in medical ultrasound diagnostics.
- 社団法人電子情報通信学会の論文
- 2002-09-01
著者
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Yamaguchi Hisao
Electronic And Mechanical Sec. Tokushima Pref. I. T. C.
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YOSHIZAKI KAZUO
Dept. of Physiology, The University of Tokushima
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Kinouchi Yohsuke
Dept. of Electric and Electronic Eng., The University of Tokushima
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Yamaguchi H
Ritsumeikan Univ.
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Yoshizaki Kazuo
Dept. Of Physiology The University Of Tokushima
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Kinouchi Yohsuke
Dept. Of Electric And Electronic Eng. The University Of Tokushima
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ZHANG Dali
the Department of Electrical and Electronic Engineering, the University of Tokushima
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HIRAO Yoji
the Department of Electrical and Electronic Engineering, the University of Tokushima
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KINOUCHI Yohsuke
the Department of Electrical and Electronic Engineering, the University of Tokushima
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YAMAGUCHI Hisao
the 1st Department of Physiology, School of Medicine, the University of Tokushima
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YOSHIZAKI Kazuo
the 1st Department of Physiology, School of Medicine, the University of Tokushima
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Zhang Dali
The Department Of Electrical And Electronic Engineering The University Of Tokushima
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Yoshizaki Kazuo
Institute Of Health Bioscience The University Of Tokushima
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Kinouchi Yohsuke
Univ. Tokushima Graduate School Tokushima Jpn
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Zhang DL
the Department of Electrical and Electronic Engineering, the University of Tokushima
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Hirao Y
the Department of Electrical and Electronic Engineering, the University of Tokushima
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Kinouchi Y
the Department of Electrical and Electronic Engineering, the University of Tokushima
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Yamaguchi H
the 1st Department of Physiology, School of Medicine, the University of Tokushima
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Yoshizaki K
the 1st Department of Physiology, School of Medicine, the University of Tokushima
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