PROBLEM TO BE SOLVED: To provide a photoacoustic imaging device capable of simultaneously detecting high sensitivity acoustic waves and acquiring signals from a wide range.SOLUTION: A measuring device includes an acoustic wave detector for detecting acoustic waves generated from a subject irradiated with light, and a member which is disposed between the acoustic wave detector and the subject and has an acoustic velocity value smaller than an average acoustic velocity value inside the subject. The thickness of the member is greater than a value obtained by dividing the acoustic velocity value inside the member by the minimum frequency detectable by the acoustic wave detector.COPYRIGHT: (C)2011,JPO&INPIT【課題】高感度な音響波の検出と、広範囲からの信号取得を両立できるような光音響画像化装置を提供する。【解決手段】光を照射することにより被検体から発生する音響波を検出する音響波検出器と、音響波検出器と被検体との間に配置され、被検体内の平均的な音速値よりも小さい音速値を有する部材と、を有し、部材の厚さは、部材内の音速値を、音響波検出器が検出可能な最小周波数で除算した値よりも大きいことを特徴とする測定装置を用いる。【選択図】図1
