To acquire highly reliable photoacoustic data by grasping the amount of light irradiated from the exit end of the probe.A photoacoustic probe including a light transmission system for transmitting light from a light source, an exit end for irradiating a subject with light and a reception unit for receiving an acoustic wave generated from a subject irradiated with light, What is claimed is: 1. An ultrasonic diagnostic apparatus comprising: a processing device that acquires information in a subject based on an acoustic wave a light amount measuring device that measures a light amount of light irradiated from an exit end a storage unit that stores the measured value The processing apparatus uses a subject information acquiring apparatus that compares the measured value with the reference value of the light amount or the history of the measured value stored in the storage unit and presents whether or not the measured value is within the reference range to the presenting unit.BACKGROUND OF THE INVENTION【課題】プローブの出射端から照射される光量を把握して、信頼性の高い光音響データを取得可能とする。【解決手段】光源からの光を伝送する光伝送系と、光を被検体に照射する出射端と光を照射された被検体から発生する音響波を受信する受信部を含む光音響プローブと、音響波に基づいて被検体内の情報を取得する処理装置と、出射端から照射される光の光量を測定する光量測定手段と、その測定値を記憶する記憶部と、提示手段を有し、処理装置は、測定値と、光量の基準値または記憶部に記憶された測定値の履歴とを比較し、測定値が基準範囲内かどうかを提示手段に提示する被検体情報取得装置を用いる。【選択図】図1A
