Abstract
A trapezoid filter is introduced to map Doppler signals to spectral lines that associate to different velocities of scatterers. The filter completely rejects frequencies outside of a trapezoid area in the two-dimensional Fourier domain of Doppler RF signals. A three-dimensional Doppler image (or a movie of a two-dimensional image) with dimensions of location, Doppler spectrum, and time, can be obtained by listing the spectral lines along the beam axis. Gated integration of the Doppler image produces a coded map showing moving scatterers with different velocities. Experiments were performed using a peripheral vascular Doppler flow phantom. The method successfully differentiated the scatterers with different velocities at 29.8 cm/s and 14.6cm/s. This new approach has potential for characterizing moving scatterers having different velocities within a sample volume.
Original language | English (US) |
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Pages (from-to) | 1483-1487 |
Number of pages | 5 |
Journal | Proceedings of the IEEE Ultrasonics Symposium |
Volume | 2 |
State | Published - 2000 |
Event | 2000 IEEE Ultrasonics Symposium - San Juan, Puerto Rico Duration: Oct 22 2000 → Oct 25 2000 |
ASJC Scopus subject areas
- Acoustics and Ultrasonics