Ultrasonic imaging apparatus

Details Ultrasonic imaging apparatus Ultrasonic imaging apparatus

1989-08-14

1990-10-02

Tokar, Michael J.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

049599984

ABSTRACT:
An ultrasonic imaging apparatus comprising an ultrasonic transducer, and a delay circuit section. The transducer has an array of ultrasonic transducer elements, and emits ultrasonic waves and receives echo waves to convert these waves into echo signals. The delay circuit section delays the echo signals by delay times determined by at least the directions in which the ultrasonic waves have been emitted from the transducer. This circuit has first and second memories for alternately writing and reading the echo signals, and a circuit for addressing the first and second memories by applying these memories with addresses, the number of which corresponds to the delay time.

REFERENCES:
patent: 4173007 (1979-10-01), McKeighen et al.
patent: 4234940 (1980-11-01), Iinuma
patent: 4267584 (1981-05-01), McKeighen et al.
patent: 4603586 (1986-08-01), Iida
patent: 4779242 (1988-10-01), Lannuzel

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