Time frequency control filter for an ultrasonic imaging system

Details Time frequency control filter for an ultrasonic imaging system Time frequency control filter for an ultrasonic imaging system

1991-08-07

1992-06-09

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367 11, 367900, 12866006, G01S 1500

Patent

active

051213648

ABSTRACT:
A phased array sector scanning ultrasonic imaging system produces digitized baseband samples of the received ultrasonic echo signals amplified by a time gain control (TGC) to compensate for dispersion losses in the media in which the ultrasonic signals propagate. A time frequency control filter employs the same TGC control signal to calculate a phase shift correction as well as the coefficients which determine the characteristics of a bandpass filter such that the frequency dependent dispersion losses in the ultrasonic echo signals are compensated.

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