대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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- Pages.705-708
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- 1988
Auto-Correlation을 이용한 펄스 도플러 시스템에 관한 연구
A study on the development of Pulsed Doppler System using Auto-Correlation
- Lim, Chun-Sung (Dept. of Electronic Eng. A-jou University) ;
- Rang, Chung-Shin (Dept. of Electronic Eng. A-jou University) ;
- Lee, Hang-Sei (Dept. of Electronic Eng. A-jou University) ;
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Kim, Young-Kil
(Dept. of Electronic Eng. A-jou University)
- 발행 : 1988.07.01
초록
Ultrasound Doppler Diagnostic System utilizes the Doppler effect for measurement of blood velocity. The sign of the Doppler frequency shift represents blood flow direction. Pulsed Doppler System uses Phase detector and zerocrossing method to produce simultaneous independent audio and velocity signals for forward and reverse blood flow direction in the time domain, had been fabricated. But time-domain analyzing such as audio evaluation and zerocrossing detection for instantaneous and mean frequency measurement doesn't, provide both an accurate and quantitative result. Therefore, it is necessary to adopt frequency domain technique to improve system performance. In this paper, we describe a unit which is composed of Pulsed Doppler System and real-time spectrum analyzer (installed TMS 32010 DSP Chip). This unit shows time-dependent spectrum variation and mean velocity of blood Signal.
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