대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(II)
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- Pages.1243-1246
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- 1987
위상 스펙트럴 차분법에 의한 초음파 감쇠 계수의 측정
Measurement Ultrasound Attenuation by Using Phase Spectral Difference Method
- Min, Yong-Ki (Dept. Electronic Eng., Chung-Ang University) ;
- Choi, Jong-Ho (Dept. Electronic Eng., Chung-Ang University) ;
- Lee, Kang-Ho (Dept. Electronic Eng., Chung-Ang University) ;
- Choi, Jong-Soo (Dept. Electronic Eng., Chung-Ang University)
- 발행 : 1987.07.03
초록
To characterize the biological tissues, the new methods to measure the frequency dependent attenuation are presented in this paper. In general, ultrasonic phase information was assumed by linear function of the frequency. But, the minimum phase function which characterizes the frequency dispersion of tissue was derived in [l]. It is very significant to measure the attenuation by using the minimum phase function to characterize the frequency dispersion of tissue. Therefore, a more efficient method measuring the frequency dependent attenuation are proposed by using the estimated sound velocity and polarity of reflected signal. To verify the algorithms, pulse reflection experiments are performed.
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