Imaging system with transmit apodization using pulse width varia

Details Imaging system with transmit apodization using pulse width varia Imaging system with transmit apodization using pulse width varia

1998-12-07

2000-10-24

Jaworski, Francis J.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

A61B 800

Patent

active

061359637

ABSTRACT:
A coherent imaging system having a phased array of transmit elements provides for transmit apodization (or weighting) by controlling pulse width of the transmit pulses on every channel. Conventional transmit apodization requires a channel-by-channel voltage (or current) control which, because of its complexity, is expensive to implement. Pulse width weighting applies the same peak voltage/current but controls pulse power by changing the duty cycle of the pulse.

REFERENCES:
patent: 4241611 (1980-12-01), Specht et al.
patent: 4937767 (1990-06-01), Reuschel et al.
patent: 5113706 (1992-05-01), Pittaro
patent: 5833614 (1998-11-01), Dodd et al.
Eli Brookner, "Practical Phased Array Antenna Systems", Artech House, 1991, pp. 2-10.
Oppenheim, Schafer, "Digital Signal Processing", Prentice Hall, 1975, pp. 239-250.

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