Estimation of Blood Velocities Using Ultrasound: A Signal Processing Approach
Cambridge University Press, 29 mars 1996 - 317 pages
Ultrasound systems are especially useful in estimating blood velocities in the human body because they are non-invasive and can display an estimate in real time. This book offers a comprehensive treatment of this relatively new, important technology. The book begins with an introduction to ultrasound, flow physics, and the circulatory system. Next, the interaction of ultrasound with blood is discussed. The remaining chapters offer a lucid, thorough description of continuous and pulsed wave systems, the latest systems for doing colour flow imaging, and, finally, some of the more recent experimental techniques. The author shows that the Doppler shift, usually considered the way velocity is detected, actually plays a minor role in pulsed systems. Rather, it is the shift of position of signals between pulses that is used in velocity estimation. This clearly written, extensively illustrated book will be immediately useful to both new and experienced workers in medical ultrasound.
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Medical ultrasound systems
Ultrasounds interaction with blood
Continuous wave systems
Pulsed wave systems
Color flow mapping using phase shift estimation
acoustic amplitude angle aperture approach array artery assumed attenuation autocorrelation function B-mode image band-pass filter bandwidth blood velocity center frequency Chapter component continuous wave correlation cross-correlation cross-correlation function demodulation denotes depth in tissue derived detected display Doppler effect Doppler shift echo canceling emitted energy equation example fluid Fourier transform fprf Gaussian given gives graph shows harmonic increase indicates intensity investigated linear matched filter maximum mean frequency measurement multiplication noise non-linear parabolic parabolic profile parameters particle peak performed phase shift position power density spectrum pressure propagation pulse emission pulse repetition frequency pulse spectrum quadrature range gate received signal result RF lines sampled signal sampling frequency scanners Section segments shown in Fig signal processing signal-to-noise ratio simulation sinusoidal sonogram spatial impulse response spectral stationary echo canceling Tprf transducer tube ultrasound beam variance vector velocity estimation velocity profile vessel zero crossing
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