Ultrasonic imaging system with multiple, dynamically focused tra

Details Ultrasonic imaging system with multiple, dynamically focused tra Ultrasonic imaging system with multiple, dynamically focused tra

1991-08-07

1992-08-25

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

G03B 4206

Patent

active

051426498

ABSTRACT:
A phased array sector scanning (PASS) ultrasonic imaging system produces a steered transmit beam with an array of transducer elements that are driven with separate carrier frequencies. A receiver forms the echo signal into a receive beam steered in the same direction as the transmit beam and is dynamically focused. A transmit beam processor Fourier transforms this receive beam to produce a signals corresponding to the separate carrier frequencies which can be delayed to retrospectively dynamically focus the transmit beam or alter the direction in which it is steered.

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