PROBLEM TO BE SOLVED: To accurately acquire an optimal value of a postulated acoustic velocity inside a subject.SOLUTION: This ultrasonic signal processing apparatus includes an ultrasonic probe transmitting ultrasonic wave to a subject, receiving ultrasonic echo from the internal of the subject, and generating a receiving signal indicating the ultrasonic echo and an optimal velocity determination section 32 acquiring an optimal acoustic velocity by finding a postulated acoustic velocity where a high-frequency component of a phase change in the receiving signal becomes the maximum.COPYRIGHT: (C)2010,JPO&INPIT【課題】被検体内での仮定音速の最適値を正確に得ること。【解決手段】被検体に向けて超音波を送信するとともに、前記被検体内からの超音波エコーを受信して、該超音波エコーを示す受信信号を生成する超音波探触子と、前記受信信号の位相変化の高周波成分が最大となる仮定音速を求めることにより、最適音速を取得する最適音速判定部32を備えた。【選択図】図4
