PROBLEM TO BE SOLVED: To suppress noise by enhancing resolution power over an entire ultrasonic irradiation area.SOLUTION: An ultrasonic signal processing device comprises: a transmission part 1031 for enabling ultrasonic transmission from a first vibrator array of an ultrasonic probe 101 a reception opening setting part 1042 for selecting a second vibrator array whose array center matches with the array center of the first vibrator array a transmission time calculation part 1043 for calculating a transmission time when an ultrasonic wave reaches an observation point in a subject for a plurality of observation points located within a range where the ultrasonic wave can reach a reception time calculation part 1044 for calculating a reception time when a reflection wave from the observation point reaches the second vibrator array a delay amount calculation part 1045 for calculating a delay amount for each reception vibrator on the basis of a total propagation time of the transmission time and the reception time a delay processing part 1046 for identifying a reception signal value corresponding to the delay amount from a reception signal array with respect to each reception vibrator and an addition part 1048 for generating an acoustic line signal with respect to the observation point based on the reception signal value.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】超音波照射領域全体にわたり分解能が高く雑音を抑制する。【解決手段】超音波プローブ101の第1の振動子列から超音波送信を行わせる送信部1031と、列中心が第1の振動子列の列中心と合致する第2の振動子列を選択する受信開口設定部1042と、超音波が到達する範囲内に位置する複数の観測点について、超音波が被検体中の観測点に到達する送信時間を算出する送信時間算出部1043と、観測点からの反射波が第2の振動子列に到達する受信時間を算出する受信時間算出部1044と、送信時間と受信時間との総伝播時間に基づいて各受信振動子に対する遅延量を算出する遅延量算出部1045と、各受信振動子に対する受信信号列から、遅延量に相当する受信信号値を同定する遅延処理部1046と、受信信号値に基づき観測点に対する音響線信号を生成する加算部1048とを備えた。【選択図】図1
