PROBLEM TO BE SOLVED: To improve accuracy upon using aperture synthesis method in order to measure displacement using ultrasonic waves in an object information acquiring apparatus.SOLUTION: An apparatus that transmits an elastic wave to an object and receives a reflected wave, which includes: a transmitting and receiving unit having elements for converting the elastic wave to an electric signal, and being arranged at least in one direction an element controlling unit that inputs the electric signal to the element and causes the element to transmit an elastic wave and a detecting unit that detects a reflected wave to be received by the element, wherein the electric signal to be inputted to the element is an encoded pulse signal encoded among the plurality of elements, and the detecting unit decodes the reflected wave and executes at different time points aperture synthesis processing of synthesizing the decoded reflected wave with respect to the intersections of both axes of a hyperbola and an ellipse with two points as a focus for acquiring the displacement at least in two directions of the object.COPYRIGHT: (C)2013,JPO&INPIT【課題】被検体情報取得装置で超音波を用いて変位を測定するために合成開口法を用いる際の精度を向上させる。【解決手段】被検体に弾性波を送信し、反射波を受信する装置であって、弾性波と電気信号とを変換可能な素子を少なくとも1方向に複数配列して備える送受信器と、素子に電気信号を入力して弾性波を送信させる素子制御手段と、素子が受信する反射波を検出する検出手段とを有し、素子に入力される電気信号は、複数の素子間において符号化された符号化パルス信号であり、検出手段は、反射波を復号化するとともに、2箇所を焦点とした双曲線および楕円を軸とした両軸の交点について復号化された反射波を合成する合成開口処理を異なる時点で行い、被検体の少なくとも2方向における変位を取得する被検体情報取得装置を用いる。【選択図】図1
