Measuring and testing – Vibration – By mechanical waves
Patent
1993-09-27
1995-03-07
Arana, Louis
Measuring and testing
Vibration
By mechanical waves
73627, G01N 2900
Patent
active
053947509
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.
REFERENCES:
patent: 4155259 (1979-05-01), Engeler
patent: 4442715 (1984-04-01), Brisken et al.
patent: 4569231 (1986-02-01), Carnes et al.
Arana Louis
Matzuk Stephen G.
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