Without impairing real time characteristic, the ultrasonic diagnostic device whose at the same time sonic revision is possible and in order to offer sonic revision processing method, this invention, setting standard speed of sound, the standard sonic picture signal, setting the strange noise speed which differs from standard speed of sound, acquires the strange noise fast picture signal, respectively, revising the standard sonic information which is based on the standard sonic picture signal, making use of the strange noise fast information which is based on the strange noise fast picture signal, information of sonic revision acquisition easy features thing.リアルタイム性を損なわずに、且つ音速補正が可能な超音波診断装置及び音速補正処理方法を提供するために、本発明は、基準音速を設定して基準音速画像信号を、基準音速と異なる異音速を設定して異音速画像信号を、それぞれ取得し、基準音速画像信号に基づく基準音速情報を、異音速画像信号に基づく異音速情報を用いて補正して、音速補正情報を取得するすることを特徴とする。
