Statistical analysis and time correlation processes applied to velocity measurement (blood flow)
- 13 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
A time description of pulsed Doppler signals backscattered by blood flow describes the pulse-Doppler effect on the successive echoes from a cloud of scatterers as a progressive translation in time due to the displacement of the scatterers along the ultrasound beam axis between two transmissions. However, a statistical analysis of the treatment provides a better description of this estimation process. In the general case where the velocity is neither axial nor uniform, the dispersion characteristics of the velocity distribution must be introduced. A description is given of the statistical averages naturally performed by the process in such cases. As a main result, the estimation of the local variance of the flow is also available. This variance has been estimated first with simulated signals for a validation of the theoretical description, then with in vivo data from pathological cases.Keywords
This publication has 4 references indexed in Scilit:
- Time Domain Formulation of Pulse-Doppler Ultrasound and Blood Velocity Estimation by Cross CorrelationUltrasonic Imaging, 1986
- A New Velocity Estimator for Color Flow MappingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1986
- The Accurate Ultrasonic Measurement of the Volume Flow of Blood by Time Domain CorrelationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1985
- A Theoretical Study of the Scattering of Ultrasound from BloodIEEE Transactions on Biomedical Engineering, 1980