PROBLEM TO BE SOLVED: To magnify an image region to be acquired, in an apparatus acquiring an image of a subject by performing a mechanical scan of a probe and transmitting/receiving an ultrasonic wave.SOLUTION: A subject information acquisition apparatus includes: a probe where a plurality of elements each transmitting an ultrasonic wave to a measurement target region of a subject and each receiving a reflected wave are arranged in a first direction a mechanical scanning means moving the probe in the first direction and a direction crossing the first direction a transmission processing means inputting an input signal for drive to each element included in a transmission aperture element row transmitting the ultrasonic wave a reception processing means composing reception signals by the elements included in a reception aperture element row receiving the reflected wave a generation means generating property information of the object from the composed signal and a control means determining at least one of the number of the elements of the transmission aperture element row, a delay amount of each element of the input signal, the number of the elements of the reception aperture element row when composing the reception signals, and a delay amount of each element, according to a position of the probe in the subject.COPYRIGHT: (C)2014,JPO&INPIT【課題】探触子を機械走査し、超音波を送受信して被検体の画像を取得する装置において、取得する画像領域を拡大する。【解決手段】被検体の測定対象領域に超音波を送信して反射波を受信する複数の素子を第一の方向に配列した探触子と、探触子を第一の方向および第一の方向と交差する方向に移動させる機械走査手段と、超音波を送信する送信開口素子列に含まれる素子に駆動のための入力信号を入力する送信処理手段と、反射波を受信する受信開口素子列に含まれる素子による受信信号を合成する受信処理手段と、合成信号から被検体の特性情報を生成する生成手段と、被検体における探触子の位置に応じて、送信開口素子列の素子数、入力信号の素子ごとの遅延量、受信信号を合成するときの受信開口素子列の素子数、素子ごとの遅延量のうち、少なくともいずれか1つを決定する制御手段を有する被検体情報取得装置を用いる。【選択図】図4
