Receiving beam former and an ultrasonic imaging system using the

Details Receiving beam former and an ultrasonic imaging system using the Receiving beam former and an ultrasonic imaging system using the

1993-05-24

1995-10-17

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73621, G01N 2900

Patent

active

054579961

ABSTRACT:
A receiving beamformer is provided which simultaneously generates a plurality of receiving beam signals corresponding to receiving beams of a plurality of directions on the basis of signals received by an array of vibrator elements for receiving an ultrasonic wave. This receiving beamformer includes a variable amplifying unit for amplifying the received signals in accordance with the depth of measurement to produce output signals, an A/D converting unit for converting the output signals from the variable amplifying unit into digital signals at a predetermined sampling period, a digital delay unit for receiving each of the digital signals and for producing a plurality of delayed signals corresponding to the receiving beams for each of the digital signals, and a first adding unit for adding the delayed signals corresponding to each of the receive beams and to the respective digital signals. The digital delay unit includes a first delay unit for delaying the respective digital signals at a unit delay time same as the sampling period to produce first delayed signals, and a second delay unit for delaying each of the first delayed signals at a unit delay time shorter than the sampling period to produce a plurality of delayed signals for each of the first delayed signals.

REFERENCES:
patent: 4679176 (1987-07-01), Ogawa et al.
patent: 4841491 (1989-06-01), Kondo et al.
patent: 5001678 (1991-03-01), Fukuoka et al.
patent: 5228007 (1993-07-01), Murakami et al.

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