Beamformer for phase aberration correction

Details Beamformer for phase aberration correction Beamformer for phase aberration correction

1995-06-30

1996-10-22

Manuel, George

Surgery

Truss

Pad

A61B 800

Patent

active

055666752

ABSTRACT:
An ultrasonic imaging system is provided that effectively corrects for inhomogeneities in the imaged media. The ultrasonic imaging system comprises a transducer array having a plurality of transducer elements each being separately operable to provide an ultrasonic pulse in response to a driving signal and to provide a corresponding echo signal in response to a received echo based on the ultrasonic pulse. A transmitter is coupled to the transducer array and provides the driving signal to each respective one of the transducer elements. The driving signals define a steered beam of the transducer array. A receiver is coupled to the transducer array and receives the echo signal from each respective one of the transducer elements. The receiver includes a beamformer section that produces a single matched and summed signal from the echo signals of the plurality of transducer elements. The beamformer section comprises a plurality of processing modules coupled in a cascading arrangement with separate processing stages.

REFERENCES:
patent: 4817614 (1989-04-01), Hassler et al.
patent: 5172343 (1992-12-01), O'Donnell
patent: 5229933 (1993-07-01), Larson, III
patent: 5388079 (1995-02-01), Kim et al.
patent: 5469851 (1995-11-01), Lipschutz
patent: 5476098 (1995-12-01), O'Donnell
A Parallel Processing System for Real-Time Phase Aberration Correction Using an Improved Phase Extraction Technique, by Paul D. Freiburger et al., Duke University, IEEE-UFFC Conference 1993, pp. 1-4.
An Evaluation of Transducer Design and Algorithm Performance for Two Dimensional Phase Aberration Correction, by Gregg E. Trahey et al., Duke University, IEEE, 1991 Ultrasonics Symposium, pp. 1181-1187.
Aberration Correction on a Two-Dimensional Anisotropic Phased Array, by M. O'Donnell et al., University of Michigan, IEEE, 1991 Ultrasonics Symposium, pp. 1189-1193.
Correlation-Based Aberration Correction in the Presence of Inoperable Elements, by Matthew O'Donnell et al., IEEE Transactions On Ultrasonics, Ferrelectrics, and Frequency Control, vol. 39, No. 6, Nov. 1992, pp. 700-707.

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