Patent ID: 6099472
Filing Date: 2000-08-08
Classification: G01S

Abstract:
An ultrasonic diagnostic system comprising:a transducer;first means for feeding a first electric drive signal to the transducer;second means for feeding a second electric drive signal to the transducer at a time different from a time at which the first means feeds the first electric drive signal to the transducer, the second electric drive signal having a waveform different from a waveform of the first electric drive signal;third means for deriving a first received signal from an output signal of the transducer, the first received signal representing ultrasonic echoes related to an ultrasonic beam caused by the transducer in response to the first electric drive signal;fourth means for deriving a second received signal from the output signal of the transducer, the second received signal representing ultrasonic echoes related to an ultrasonic beam caused by the transducer in response to the second electric drive signal;fifth means for subjecting the first received signal to a waveform equalizing process to convert the first received signal into a third received signal having a waveform corresponding to a waveform of the second received signal; andsixth means for calculating a difference between the second received signal and the third received signal, and generating a signal representing the calculated difference.