PROBLEM TO BE SOLVED: To provide a subject information acquisition apparatus which can reduce artifacts of a restructured image, and can be downsized.SOLUTION: A subject information acquisition apparatus comprises: a light source 100 light irradiation means 200 which irradiates light emitted by the light source to a subject and a plurality of acoustic detection elements 300 which receives photoacoustic waves generated in the subject by the light irradiation and converts them to electrical signals. Each of the plurality of the acoustic detection elements possesses a supersensitive receiving axis, and the supersensitive receiving axes in at least a part of the acoustic detection elements are configured so as to be arranged radially inside the subjects body.COPYRIGHT: (C)2015,JPO&INPIT【課題】再構成した画像のアーチファクトを低減し、装置を小型化することができる被検体の情報取得装置を提供する。【解決手段】光源100と、該光源が発する光を被検体へ照射する光照射手段200と、光照射により被検体内で発生する光音響波を受信し電気信号に変換する複数の音響検出素子300を備え、複数の音響検出素子のそれぞれは高感度受信軸を有し、複数の音響検出素子のうち少なくとも一部の音響検出素子における高感度受信軸は被検体内で放射状に配置されるように構成されている【選択図】図1
