PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus which highly accurately calculates blood flow velocity by improving irregularity in calculated values of the blood flow velocity due to speckle noise.SOLUTION: An ultrasonic diagnostic apparatus transmits ultrasonic beams in accordance with plural kinds of pulse signals with mutually-different frequencies or change loci of the frequency, generates plural kinds of reception signals respectively representing the ultrasonic beams in accordance with the plural kinds of pulse signals, generates an added reception signal by adding the plural kinds of reception signals to each other, and calculates the blood flow velocity on the basis of the added reception signal.COPYRIGHT: (C)2015,JPO&INPIT【課題】 本発明は、超音波診断装置に関し、スペックルノイズによる血流速度の算出値の乱れを改善し血流速度を高精度に算出する。【解決手段】 周波数もしくは周波数の変化軌跡が互いに異なる複数種類のパルス信号に応じた超音波ビームを送波し、複数種類のパルス信号に応じた、それぞれが超音波ビームを表わす複数種類の受信信号を生成し、複数種類の受信信号を互いに加算して加算受信信号を生成し、加算受信信号に基づいて血流速度を算出する。【選択図】 図6
