PROBLEM TO BE SOLVED: To suppress noises generated by irradiating an acoustic wave detector with light, in photoacoustic diagnosis.SOLUTION: A subject information acquisition device for use includes: an irradiation part that applies light from a light source a detection part that receives an acoustic wave generated by the light applied to a subject, after the emission of the light from the irradiation part an intensity reduction part that reduces intensity of the light applied to the detection part, after the emission of the light from the irradiation part and a processing part that acquires information on characteristics of the inside of the subject by using the acoustic wave received by the detection part.COPYRIGHT: (C)2015,JPO&INPIT【課題】光音響診断において、音響波検出器への光照射により生じるノイズを抑える。【解決手段】光源からの光を照射する照射部と、照射部から出射したのち、被検体に照射される光に起因して発生する音響波を受信する検出部と、照射部から出射したのち、検出部に照射される光の強度を低減させる強度低減部と、検出部が受信した音響波を用いて被検体内部の特性情報を取得する処理部を有する被検体情報取得装置を用いる。【選択図】図1
