PROBLEM TO BE SOLVED: To provide an ultrasonic imaging device capable of optimizing an amplification factor (gain) of a color Doppler image obtained from a site to be diagnosed (site to be measured) of a subject.SOLUTION: An ultrasonic diagnostic device includes: a gain control part 40 which changes amplification factors of color Doppler images of a plurality of frames a noise component detection part 41 which distinguishes a high frequency component having higher Doppler signal intensity than a first threshold from a low frequency component having lower Doppler signal intensity than the first threshold by using the first threshold of the Doppler signal intensity and detects the low frequency component as noise a noise component integration part 42 which integrates the Doppler signal intensity of the noise component in each frame of the color Doppler image and an optimum gain calculation part 43 which calculates the amplification factor corresponding to the prescribed integrated value on the basis of the amplification factor associated with the integrated value of the Doppler signal intensity of the noise component.COPYRIGHT: (C)2015,JPO&INPIT【課題】被検体の診断部位(計測部位)から得られたカラードプラ画像の増幅率(ゲイン)を最適化することができる超音波画像撮像装置を提供する。【解決手段】複数フレームのカラードプラ画像の増幅率を変化させるゲイン制御部40と、ドプラ信号強度の第1の閾値を用いて、前記第1の閾値より前記ドプラ信号強度が高い高周波成分と前記第1の閾値より前記ドプラ信号強度が低い低周波成分とを区別し、前記低周波成分をノイズとして検出するノイズ成分検出部41と、前記カラードプラ画像の各フレームにおける前記ノイズ成分の前記ドプラ信号強度を積算するノイズ成分積算部42と、前記ノイズ成分の前記ドプラ信号強度の積算値に関連付けられた前記増幅率に基づいて、所定の前記積算値に対応する前記増幅率を最適ゲインとして演算する最適ゲイン演算部43とを備える。【選択図】図3
