PROBLEM TO BE SOLVED: To provide a subject information acquiring apparatus capable of performing photoacoustic measurement and background optical coefficient measurement by using a common light source.SOLUTION: A subject information acquiring apparatus disclosed in the present specifications comprises: a light source light irradiation means for irradiating a subject with pulsed light an acoustic wave probe for converting an acoustic wave generated in the subject due to the first pulsed light projected from the light irradiation means into an acoustic wave signal photodetection means for converting second pulsed light projected from the light irradiation means and propagated through the subject into an optical signal frequency analysis means for acquiring a background optical coefficient with respect to the inside of the subject on the basis of a predetermined frequency component of the optical signal light intensity acquiring means for acquiring a distribution of light intensity of the first pulsed light reaching the inside of the subject on the basis of the background optical coefficient and information acquiring means for acquiring subject information on the basis of the acoustic wave signal and the distribution of light intensity.COPYRIGHT: (C)2015,JPO&INPIT【課題】光音響測定と背景光学係数の測定を共通の光源で行うことができる被検体情報取得装置を提供する。【解決手段】本明細書が開示する被検体情報取得装置は、光源と、被検体にパルス光を照射する光照射手段と、光照射手段から照射された第一のパルス光に起因して被検体内で発生した音響波を音響波信号に変換する音響波探触子と、光照射手段から照射され、被検体内を伝搬した第二のパルス光を光信号に変換する光検出手段と、光信号の所定の周波数成分に基づいて被検体内の背景光学係数を取得する周波数解析手段と、背景光学係数に基づいて被検体内に到達する第一のパルス光の光強度分布を取得する光強度取得手段と、音響波信号と光強度分布とに基づいて、被検体内における被検体情報を取得する情報取得手段と、を有する。【選択図】図1
