PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus in which noise by clutter components is suppressed, with blood stream more clearly displayed.SOLUTION: An ultrasonic diagnostic apparatus includes: an MTI filter 152 that attenuates clutter components in receiving signals a pre-attenuation correlation arithmetic part 156 that determines a dispersion value of velocity at each point from the pre-attenuation receiving signal of the clutter components in the MTI filter a post-attenuation correlation arithmetic part 153 that determines an index of blood stream at each point from the post-attenuation signal in the MTI filter an image display part 16 for displaying an image indicating the blood stream and a display control part 154 that displays the determined index after replacing it with an index indicating no blood stream, with reference to the points in which, of each point, the dispersion value determined by the pre-attenuation correlation arithmetic part coincides with blood stream non-display conditions containing dispersion conditions falling below a first threshold value.COPYRIGHT: (C)2014,JPO&INPIT【課題】クラッタ成分によるノイズが抑えられ、血流がより鮮明に表示される超音波診断装置を提供する。【解決手段】受信信号中のクラッタ成分を減衰させるMTIフィルタ152と、MTIフィルタでのクラッタ成分の減衰前の受信信号から各点における速度の分散値を求める減衰前相関演算部156と、前記MTIフィルタでの減衰後の信号から各点における血流の指標を求める減衰後相関演算部153と、血流を表わす画像を表示する画像表示部16と、各点のうち、減衰前相関演算部によって求められた分散値が第1の閾値を下回る分散条件を含む血流非表示条件に合致する点については求められた指標を血流が無いことを表わす指標に置き換えた上で表示させる表示制御部154とを備えた。【選択図】図4
