US 5,394,750 AGranted

Tissue signature tracking transceiver

OwnerTerrance Matzukinventor

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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.

Claims4

Dependent claims

A receiver for providing a baseband output signal corresponding to the magnitude of an amplitude modulated RF input signal received from a medium transmitted signal, comprising:

means for providing a first oscillator signal, which when combined with the RF input signal, provides a first baseband signal;
first means for combining said oscillator signal and said RF input signal and providing a first baseband signal therefrom;
means for providing a second oscillator signal having a phase difference from said first oscillator signal, which when combined with the RF input signal, provides a second baseband signal;
second means for combining said second oscillator signal and said RF input signal and providing a second baseband signal therefrom;
means for providing said baseband output signal according to the vector sum of said first and said second baseband signals;
and
means for adjusting the frequency of said first and said second oscillator signals in response to an expected medium transmission induced frequency change of said input signal while at least one of said first and second means for combining is providing its respective baseband signal therefrom.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/126,637Filed 27 Sep 1993 · division
Priority: 4 Jun 1984
Granted: 7 Mar 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H03H 11/1217
Using amplifiers with feedback: using a plurality of operational amplifiers
G01S 7/52025
Details of receivers: for pulse systems
G01S 15/8954
Characterised by the transmitted frequency spectrum: using a broad-band spectrum
H03H
Impedance networks

Family

Serial616,581Parent of this continuation-in-part · filed 4 Jun 1984
Serial850,269Parent of this division · filed 10 Apr 1986
Serial10,966Parent of this continuation · filed 3 Feb 1987
Serial692,965Parent of this division · filed 1 Aug 1991
US 5,261,280 AParent of this division
US 4,676,105 AParent of this division
US 4,584,880 AParent of this continuation-in-part
US 5,394,750 AThis patent

From the US filing history. Foreign family members aren’t listed.