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

Content Provider	IEEE Xplore Digital Library
Author	Yi Zheng Aiping Yao Greenleaf, J.F.
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng., St. Cloud State Univ., MN, USA (Yi Zheng)
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 14.6 cm/s. This new approach has potential for characterizing moving scatterers having different velocities within a sample volume.
Starting Page	1483
Ending Page	1486
File Size	375658
Page Count	4
File Format	PDF
ISBN	0780363655
ISSN	10510117
DOI	10.1109/ULTSYM.2000.921604
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Scattering Filters Frequency Ultrasonic imaging Fourier transforms Clouds Imaging phantoms Direction of arrival estimation Transducers Motion pictures
Content Type	Text
Resource Type	Article

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