| 摘要 |
<p>PROBLEM TO BE SOLVED: To highly accurately obtain blood velocity over a wide range in comparison with a conventional one in an ultrasonic diagnostic device which transmits an ultrasonic beam into an analyte, obtains a reception signal by receiving an ultrasonic wave returned by reflection, calculates the blood velocity on the basis of the reception signal and displays blood flow velocity distribution in color.SOLUTION: An ultrasonic diagnostic device transmits ultrasonic beams with plural center frequencies in accordance with plural kinds of burst wave signals with mutually different transmission frequencies of pulses, generates plural kinds of reception signals in accordance with the plural kinds of burst wave signals, performs primary calculation of blood flow velocity for each kind of reception signal on the basis of a complex autocorrelation method for each kind of reception signal among the plural kinds of reception signals, and performs secondary calculation of blood flow velocity on the basis of plural calculated values of the calculated blood flow velocity.</p> |
