Transmit focus generator for ultrasound imaging

Details Transmit focus generator for ultrasound imaging Transmit focus generator for ultrasound imaging

1989-02-01

1989-10-03

Jaworski, Francis

Surgery

Truss

Pad

73625, A61B 800, G01N 7900

Patent

active

048709719

ABSTRACT:
A transmit focus generator circuit for pulsing an array of transducers in an ultrasound pulse echo imaging system for transmission of a focused beam of coherent ultrasound energy. A system clock is separated into eight phases. Focusing is achieved by controlling the clock phase delay and burst delay of transmission from each transducer element. Precalculated waveform parameters are stored in a system memory. For each line scan, registers in a transmit focus block for each transducer driver circuit are loaded with the waveform parameters. For each transducer element within the aperture for a particular line scan, the circuit controls the output of pulses to achieve a focused wavefront.

REFERENCES:
patent: 4611494 (1984-11-01), Uchiyama
patent: 4653000 (1987-03-01), Matsumoto

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