대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)
- 대한의용생체공학회 1985년도 춘계학술대회
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- Pages.15-19
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- 1985
칼만 필터를 이용한 초음파 신호의 해상력 향상
Resolution Improvement of Ultrasound Signal Using Kalman Filter
- 우광방 (연세대학교 대학원 전기공학과) ;
- 남상일 (연세대학교 대학원 전기공학과) ;
- 신동호 (연세대학교 대학원 전기공학과) ;
- 진영민 (연세대학교 대학원 전기공학과) ;
- 이성모 (연세대학교 대학원 전기공학과)
- Woo, Kwang-B. (Dept. of Electrical Eng., Yonsei University) ;
- Nam, Sang-E. (Dept. of Electrical Eng., Yonsei University) ;
- Shin, Dong-H. (Dept. of Electrical Eng., Yonsei University) ;
- Chin, Young-M. (Dept. of Electrical Eng., Yonsei University) ;
- Lee, Sung-M. (Dept. of Electrical Eng., Yonsei University)
- 발행 : 1985.06.21
초록
This study deals with a kind of signal processing, Kalman filtering techniques, which are applied to ultrasound signal to improve resolution capability. The main advantage of Kalman filter algorithm for the analysis of reflected ultrasound signal is its recursive structure which can be easily adapted to time-varing system. In state-space description of the system, the 6th order system produces the best spectral approximation to the source pulse. As a result of spectrum analysis, 6th order estimator for two closely spaced (0.5mm) reflectors enhance resolution by 4dB - 10dB. By using this result, the possibility to detect even minute tumor is found.
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