Method and means for steering phased array scanner in ultrasound

Details Method and means for steering phased array scanner in ultrasound Method and means for steering phased array scanner in ultrasound

1985-10-31

1987-05-05

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73609, 367103, 128660, G01N 2900

Patent

active

046622233

ABSTRACT:
A phased array of transducer elements in an ultrasound imaging system is selectively directed by grouping transducer elements in the array to form a plurality of groups of adjacent transducer elements. Electrical signals in each group are mixed with a modulation signal of a fixed frequency, the modulation signal being selectively phased delayed for each electrical signal in the group depending on the angle of direction of a reflection point in an imaged volume. The mixed electrical signals for each group are then summed and selectively timed delayed, and then all time delayed and summed electrical signals are then summed to form an image beam.

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