Method and apparatus for beamformer system with variable apertur

Details Method and apparatus for beamformer system with variable apertur Method and apparatus for beamformer system with variable apertur

1995-05-02

1997-04-08

Manuel, George

Surgery

Truss

Pad

A61B 800

Patent

active

056178620

ABSTRACT:
An ultrasonic scanner imaging system includes connections to one or more transducer arrays of at least M elements each, a transmit beamformer with N processors, and a receive beamformer with N processors. Separate transmit and receive multiplexers permit switching between transmit firings to any contiguous N-element transmit or receive aperture completely within a transducer array or straddled across two arrays. The transmit and receive apertures for a given firing may be independently placed and are not required to coincide. Such flexibility supports random aperture placement, sliding aperture acquisitions, and synthetic aperture acquisitions. The multiplexers also permit shorting adjacent transducer elements to enable 2N elements to be used in conjunction with N-channel transmit/receive beamformers. Beamforming to create synthetic apertures of P*N<=M elements are accomplished with the multiplexing arrangement by coherently summing the receive beamformer pre-detected output from at least P acquisition firings.

REFERENCES:
patent: 4183249 (1980-01-01), Anderson
patent: 4553437 (1985-11-01), Luthra et al.
patent: 4693120 (1987-09-01), Robinson
patent: 4733562 (1988-03-01), Saugeon
patent: 5121364 (1992-06-01), O'Donnell
patent: 5269307 (1993-12-01), Fife et al.
patent: 5329930 (1994-07-01), Thomas, III et al.
"Weighted Least-Squares Pulse-Shaping Filters With Application To Ultrasonic Signals" by Bengt Mandersson and Goran Salmonsson.

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