PROBLEM TO BE SOLVED: To provide a technique accommodating to a change in attenuation corresponding to positions of a probe in a device, while scanning a probe, transmitting/receiving ultrasonic waves with respect to a subject, and acquiring characteristic information.SOLUTION: A subject information acquisition device includes: a reception part 003 including a plurality of devices that transmit acoustic waves, receive echo waves formed by the acoustic waves reflected the subject, and output electric signals； a transmission control part 011 that control intensity of the acoustic waves to be transmitted from the plurality of devices； a scanning part 007 that moves the reception part 003 in a prescribed scanning area； and information processing part 009 that acquires characteristic information inside the subject using the electric signals. The transmission control part 011 controls the intensity of the acoustic waves according to the shape of a subject 001, and a position of the reception part 003 at the prescribed scanning area.SELECTED DRAWING: Figure 1【課題】探触子を走査しながら被検体に超音波を送受信して特性情報を取得する装置において、探触子の位置に応じた減衰量の変化に対応するための技術を提供する。【解決手段】被検体情報取得装置は、音響波を送信するとともに、音響波が被検体で反射したエコー波を受信して電気信号を出力する複数の素子を含む受信部００３と、複数の素子から送信される音響波の強度を制御する送信制御部０１１と、受信部００３を所定の走査領域において移動させる走査部００７と、電気信号を用いて被検体内の特性情報を取得する情報処理部００９を有し、送信制御部０１１は、被検体００１の形状と、所定の走査領域における受信部００３の位置と、に応じて、音響波の強度を制御する。【選択図】図１
