PROBLEM TO BE SOLVED: To provide a device which can highly accurately acquire movement information of a measurement target even when there is an unnecessary reflection wave that may cause a measurement error in detection of a movement speed of the measurement target.SOLUTION: A subject information acquisition device comprises: a plurality of conversion elements 002 which transmit sound wave pulses to a subject to receive reflection waves that are reflected at a plurality of positions in the subject, and convert the respective reflection waves into time series of reception signals and a processing unit which acquires movement information of a target in the subject by using the plurality of reception signals output from the plurality of conversion elements. The processing unit extracts a plurality of signals indicating movement components by using the plurality of reception signals, performs adaptive signal processing by using a plurality of signals indicating the movement components, and acquires movement information of the target by using a plurality of output signals after the adaptive signal processing.COPYRIGHT: (C)2014,JPO&INPIT【課題】不要な反射波が存在する中で、測定対象物の移動速度を検出する際に誤差が生じる可能性がある。不要な反射波が存在する場合でも、対象物の移動情報をより高精度に取得可能な装置を提供する。【解決手段】被検体に音響波パルスを送信し、被検体内の複数の位置で反射した反射波を受信して時系列の受信信号に夫々変換する複数の変換素子002と、複数の変換素子から出力される複数の前記受信信号を用いて、前記対象物の移動情報を取得する処理部と、を有し、前記処理部は、前記複数の受信信号を用いて、移動成分を示す信号を複数抽出し、前記複数の移動成分を示す信号を用いて適応型信号処理を行い、前記適応型信号処理後の出力信号を複数用いて前記対象物の移動情報を取得する。【選択図】図1
