Ultrasonic diagnostic apparatus and ultrasonic image display method

Abstract

An ultrasonic diagnostic apparatus preferable for creating a sharper image from the signal originating from contrast medium and the signal originating from biological tissues and an ultrasonic image display method are provided. The ultrasonic diagnostic apparatus comprises an ultrasonic probefor transmitting/receiving ultrasonic waves to/from an object to be examined, transmission meansfor providing drive signals to ultrasonic probe, reception means for receiving the received signals outputted from ultrasonic probe, signal processing meansfor processing the received signals outputted from the receiving means, image processing meansfor constructing an ultrasonic image from the signals outputted from signal processing means, and display means for displaying the ultrasonic image. Signal processing meanshas means for detecting the signal intensity and the amount of variation with time of the received signal outputted from reception meansfor each frequency band. Image processing meanshas means for distinguishing the signal of the ultrasonic image originating from the contrast medium and the signal originating from the biological tissues. The signal intensity and the amount of variation with time of the received signal obtained by transmitting/receiving ultrasonic waves to/from the object are detected for each frequency band, the signals originating from the contrast medium and the biological tissues are distinguished on the basis of the signal intensity and the quantity of variation of time for each frequency band, and an ultrasonic image is displayed.