DocumentCode :
3692199
Title :
High frame rate vector velocity estimation using plane waves and transverse oscillation
Author :
Jonas Jensen;Matthias Bo Stuart;Jørgen Arendt Jensen
Author_Institution :
Center for Fast Ultrasound Imaging, Dept. of Elec. Eng. Bldg. 349, Technical University of Denmark, DK-2800 Lyngby, Denmark
fYear :
2015
Firstpage :
1
Lastpage :
4
Abstract :
This paper presents a method for estimating 2-D vector velocities using plane waves and transverse oscillation. The approach uses emission of a low number of steered plane waves, which result in a high frame rate and continuous acquisition of data for the whole image. A transverse oscillating field is obtained by filtering the beamformed RF images in the Fourier domain using a Gaussian filter centered at a desired oscillation frequency. Performance of the method is quantified through measurements with the experimental scanner SARUS and the BK 2L8 linear array transducer. Constant parabolic flow in a flow rig phantom is scanned at beam-to-flow angles of 90, 75, and 60°. The relative bias is between -1.4 % and -5.8 % and the relative std. between 5%and 8.2%for the lateral velocity component at the measured beam-to-flow angles. The estimated flow angle is 73.4° ± 3.6° for the measurement at 75°. Measurement of pulsatile flow through a constricted vessel demonstrate the application of the method in a realistic flow environment with large spatial and temporal flow gradients.
Keywords :
"Oscillators","Estimation","Imaging","Ultrasonic imaging","Radio frequency","Electron tubes","Measurement"
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium (IUS), 2015 IEEE International
Type :
conf
DOI :
10.1109/ULTSYM.2015.0423
Filename :
7329188
Link To Document :
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