Ultrasonic diagnostic apparatus and pulse compression apparatus

Details Ultrasonic diagnostic apparatus and pulse compression apparatus Ultrasonic diagnostic apparatus and pulse compression apparatus

1989-04-17

1990-08-14

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

12866001, G03B 4206

Patent

active

049493132

ABSTRACT:
In a pulse compression apparatus for use in an ultrasonic diagnostic apparatus in which an ultrasonic chirp pulse whose frequency is increased or decreased in time is emitted toward a body under inspection, an ultrasonic wave reflected by the body is received to generate an echo signal, a correlation between the echo signal and a reference wave is derived to compress the echo signal, and an ultrasonic image is formed in accordance with the compressed echo signal, the reference wave is formed by processing an echo signal reflected from a reference body having a known acoustic property or an ultrasonic wave permeable window of a cap which surrounds an ultrasonic vibrating element, and the thus formed reference wave is stored in a memory. When the ultrasonic image of the body under inspection is displayed, the echo signal reflected from the body is pulse-compressed by deriving a correlation between the reference wave and the echo signal, and the thus compressed echo signal is used to display the ultrasonic image.

REFERENCES:
patent: 3886490 (1975-05-01), Green
patent: 4090169 (1978-05-01), Adair et al.
patent: 4425634 (1984-01-01), Iino et al.
patent: 4449209 (1984-05-01), Zehner et al.
patent: 4716414 (1987-12-01), Luttrell et al.

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