Differentiation of moving scatterers with different velocities using trapezoid filter and pulse echo ultrasound

Yi Zheng, Aiping Yao, James F. Greenleaf

Research output: Contribution to journalConference article

1 Scopus citations


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 languageEnglish (US)
Pages (from-to)1483-1487
Number of pages5
JournalProceedings of the IEEE Ultrasonics Symposium
StatePublished - Dec 1 2000
Event2000 IEEE Ultrasonics Symposium - San Juan, Puerto Rico
Duration: Oct 22 2000Oct 25 2000


ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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