Ultrasonic imaging method and apparatus

Details Ultrasonic imaging method and apparatus Ultrasonic imaging method and apparatus

A - Human Necessities

61

B

349/36

A61B 10/00 (2006.01) A61B 8/08 (2006.01) G01N 29/06 (2006.01) G01S 15/89 (2006.01)

Patent

CA 1057845

ABSTRACT OF THE DISCLOSURE The ultrasonic imaging method and apparatus comprises an ultrasonic wave transducer supplied with recurrent multi- frequency energy pulses for pulse insonification of an object under investigation with ultrasonic waves. Resultant echo waves from the object are directed onto the transducer for converting the same to electrical signals which are supplied to a signal processor which includes a variable bandpass filter. One or more of the filter characteristics are varied as a function of depth from which the echo signals are returned for enhanced resolution and signal-to-noise ratio of the received signal. Preferably, the filter is matched to the noise and signal spectra of the system. For B scan operation wherein reverberated acoustic pulses are derived from a range of depths a time variable filter is employed for time varying operation thereof. - 1 -

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