Measuring and testing – Vibration – By mechanical waves
Patent
1991-08-01
1993-11-16
Arana, Louis
Measuring and testing
Vibration
By mechanical waves
73626, 12866108, G01N 2900
Patent
active
052612805
ABSTRACT:
An ultrasound transceiver providing enhanced imaging by selective filtering of the received signal to provide a variable frequency, constant bandwidth filtering of the received echo signals. The resulting signals are then detected to produce a signal, which when displayed, has a reduced number of false multiple images and enhanced signal quality from the deeper tissue discontinuities. Additionally, the received signal is detected in quadrature by reference to a simulated carrier pilot tone having a nonconstant frequency relationship to the transmitted signal The resulting signal is post-processed to provide information which is used to display structural features, and in addition, the velocity profile of blood flow. The structure and velocity image information is superimposed to provide a composite signal wherein the static and dynamic characteristic of a patient is completely reported to the observer.
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Program and Abstracts, Ninth International Symposium on Ultrasonic Imaging and Tissue Characterization, Jun. 3-6, 1984, Washington, D.C., Academis Press, Inc.
Arana Louis
Matzuk Stephen G.
Matzuk Stephen G.
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