In the ultrasonic blood style spectrum display image, visibility of contour form of the signal component the ultrasonic image pickup device which improvement can obtain is offered. The boundary value of signal brightness and the noise brightness which the signal and the noise which are included in the time change ripple mark of degree of blood flux of the suffering inspection body where it calculated the Doppler frequency deviation of the receiving wave signal which is output from the reception section, was based on Doppler frequency deviation and provided the brightness revision arithmetic logical unit which does the brightness revision of the output result of the Doppler arithmetic logical unit which calculates the degree of blood flux of the suffering inspection body as for the brightness revision arithmetic logical unit, was required in the Doppler arithmetic logical unit, degree of blood flux and with respect to the space which is defined at time the result of the filtering processing section and the filtering processing which are separated due to continuity were required as a parameter brightness revisionIt possesses with the brightness revision processing section which it does.超音波血流スペクトラム表示画像において、信号成分の輪郭形状の視認性を向上せしめ得る超音波撮像装置を提供する。受信部から出力された受波信号のドプラ周波数偏移を算出し、ドプラ周波数偏移に基いて被検体の血流速度を算出するドプラ演算部の出力結果の輝度補正を行う輝度補正演算部を設け、輝度補正演算部は、ドプラ演算部で求められた被検体の血流速度の時間変化波形に含まれる信号とノイズを、血流速度と時間で定義される空間上での連続性により分離するフィルタリング処理部と、フィルタリング処理の結果求められた信号輝度とノイズ輝度の境界値をパラメータとして輝度補正を行う輝度補正処理部とを有する。
