대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제16권3호
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  • Pages.279-288
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  • 1995
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  • 1229-0807(pISSN)
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  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

초음파 도플러 시스템에서 2차 샘플링을 이용한 공간축상의 평균 방법

A Spatial Average Method Using 2nd Order Sampling in Ultrasonic Doppler System

  • 백광렬 (부산대학교 공과대학 전자공학과)
  • 발행 : 1995.09.01
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초록

Ultrasonic Doppler systems for the purpose of estimating blood flow velocity, blood flow volume, and flow imaging are commonly used due to advantages of non-invasive and real time observation. Specially, the technical developments of color flow mapping (2-D Doppler) systems have made a relatively rapid progress. However, the 2-D Doppler systems have several problems, such as the range ambiguity, low signal to noise ratio, and slow frame rate. The slow frame rate problem is resolved by using the spatial average which is a method to acquire more data samples for mean frequency estimation. In this paper, spatial average method using the 2nd order sampling instead of quadrature sampling is proposed. The experimental results show that the proposed methods have good performance and easy application to the color flow mapping system.

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참고문헌

  1. IEEE Trans. on Sonics and Ultrasonics v.SU-32 Real-time two-dimensional blood flow imaging using an autocorrelation Technique Kasai,C.;Namekawa,K.;Koyano,A.;Omoto,R.
  2. ECHOCARDIOGRAPHY v.3 no.6 Basic principles of Doppler color flow imaging Omoto,R.;Kasai,C.
  3. Ultrasonic Imaging v.8 Simulation of real-time frequency estimators for pulsed Doppler systems van Leeuwen,G.H.;Hoeks,A.P.G.;Reneman,R.S.
  4. 의공학회지 v.11 no.1 제2차 샘플링을 이용한 2-D도플러 시스템의 시뮬레이션과 시스템구현에 관한연구 임춘성;이용곤;박세현;김영길
  5. IEEE trans. Circuit and System v.CAS-24 no.1 Generalizas sampling Expansion Papoulis,A.
  6. Hewlett-Packard J. v.6 Extraction of blood flow information using Doppler shifted Ultrasound Halberg,L.I.;Thiele,K.E.
  7. 의공학회지 v.16 no.2 초음파 도플러 시스템에서 새로운 평균 주파수 확장 방법 백광렬
  8. IEEE Trans. Sonics and Ultrason. v.SU-30 Time dilation and inversion properties and the output spectrum of pulsed flowmeters Newhouse,V.L.;Amir,I.