Spectral composition of doppler signals

Ultrasound in Medicine and Biology

Volumn 17, Issue 8, 1991, Pages 751-760

  Hoeks, Arnold P G ^a   Hennerici, Michael ^b   Reneman, Robert S ^a  

^a MAASTRICHT UNIVERSITY   (Netherlands)

^b UNIVERSITY OF HEIDELBERG   (Germany)

Author keywords

Doppler signal; Frequency analysis; Signal analysis; Spectral broadening; Transit time effect; Ultrasound

Indexed keywords

BIOMEDICAL ENGINEERING--DIAGNOSIS; DOPPLER EFFECT--SPECTRUM ANALYSIS; ULTRASONIC WAVES--SCATTERING; ULTRASONICS--MEDICAL APPLICATIONS;

DOPPLER ECHOCARDIOGRAPHY; DOPPLER SIGNAL SPECTRUM ANALYSIS; NONINVASIVE VASCULAR SYSTEM MONITORING; ULTRASONIC DOPPLER EFFECTS; ULTRASOUND SPECTRAL BROADENING;

BIOMEDICAL ENGINEERING;

ARTICLE; CONTROLLED STUDY; DOPPLER ECHOGRAPHY; SIGNAL PROCESSING; SPECTROMETRY;

HUMAN; SIGNAL PROCESSING, COMPUTER-ASSISTED; SPECTRUM ANALYSIS; ULTRASONICS;

EID: 0026314690     PISSN: 03015629     EISSN: None     Source Type: Journal    
DOI: 10.1016/0301-5629(91)90157-R     Document Type: Article

References (53)

1. Instantaneous and time-varying spectra-An introduction
2. A theoretical study of the scattering of ultrasound by blood
3. Discrete time estimation of the mean Doppler frequency in ultrasonic blood velocity measurements
4. A new time domain technique for velocity measurements using Doppler ultrasound
5. Influence of spectral broadening on continuous wave Doppler ultrasound spectra A geometric approach
6. Effects of transducer geometry and flow velocity profile on the Doppler power spectrum A theoretical study
7. A guided tour of the fast Fourier transform
8. On the aliasing problem in pulsed Doppler cardiac studies
9. A critical study of ultrasound Doppler spectral analysis for detecting carotid disease
10. Speckle in ultrasound B-mode scans
11. Theory of ultrasound Doppler-spectra velocimetry for arbitrary beam and flow configurations
12. Computer evaluation of spectral envelope area in patients having a valvular stenosis
13. Influence of beam profile on the CW-Doppler ultrasound spectrum and mean velocity
14. Objective algorithm for maximum frequency estimation in Doppler spectral analysers
15. Determination of the hemodynamic factors that influence the carotid spectral broadening
16. The location of peak pressures and peak intensities in finite amplitude beams from a pulsed focussed transducer
17. The directional characteristics of some ultrasonic Doppler blood-flow probes
18. Nonstationarity broadening in pulsed Doppler spectrum measurements
19. Accuracy calculations for ultrasonic pulsed Doppler blood flow measurements
20. Computer processing of cardiac Doppler signals
21. Methods to evaluate the sample volume of pulsed Doppler systems
22. A novel frequency estimator for sampled Doppler signals
23. A comparison of three different filters for speckle reduction of Doppler spectra
24. Real-time two-dimensional blood flow imaging using an autocorrelation technique
25. Quantitative estimation of spectral broadening for the diagnosis of carotid arterial disease Method and in vitro results
26. Spectral broadening in ultrasonic Doppler flowmeters due to unsteady flow
27. Empirical findings relating sample volume size to diagnostic accuracy in pulsed Doppler cerebrovascular studies
28. Sources of variability in carotid Duplex examination A prospective study
29. Optimal receiver filtering in pulsed Doppler ultrasound blood velocity measurements
30. Time-domain estimation of the center frequency and spread of Doppler spectra in diagnostic ultrasound
31. Hemodynamics in the normal human carotid bifurcation In vitro and in vivo studies
32. Simulation of real-time frequency estimators for pulsed Doppler systems
33. Limitations of spectral broadening in the early detection of carotid artery disease due to the size of the sample volume
34. A stochastic model of the backscat-tered Doppler ultrasound from blood
35. Speckle in continuous wave Doppler ultrasound spectra: A simulation study
36. Flow patterns in the human carotid bifurcation
37. Time dilation and inversion properties and the output spectrum of pulsed Doppler flowmeters
38. Analysis of transit time effects on Doppler flow measurements
39. The dependence of ultrasound Doppler bandwidth on beam geometry
40. Theoretical and practical aspects of pulsed Doppler flowmetry: Real-time application to the measure of instantaneous velocity profiles in vitro and in vivo
41. Flow velocity patterns in the carotid bifurcations of young presumed normal subjects
42. Local Doppler audio spectra in normal and stenosed carotid arteries in man
43. Flow velocity patterns in and distensibility of the carotid artery bulb in subjects of various ages
44. Signal energy distribution in time and frequency
45. Effects of phase cancellation on scattering measurements
46. Spatial and temporal resolution of aortic blood velocity signals in normal human subjects
47. Doppler ultrasound spectral power density distribution: Measurement artefacts in steady flow
48. A tracking FFT-processor for pulsed Doppler analysis beyond the Nyquist limit
49. The use of the fast Fourier transform for the estimation of power spectra: A method based on time averaging over short, modified periodegrams
50. Doppler developments in the last quinquennium
51. Value of spectral broadening index in continuous wave Doppler measurements