PROBLEM TO BE SOLVED: To provide a device capable of associating a photoacoustic image with each of ultrasonic images acquired at a higher frame rate than the photoacoustic image.SOLUTION: An information processing device acquires an ultrasonic image at a higher frame rate than a photoacoustic image, and acquires a first photoacoustic image at a first time point, a second photoacoustic image at a second time point later than the first time point, and a first ultrasonic image at a third time point included in a period later than the first time point and earlier than the second time point, and associates at least one of the photoacoustic images of the first photoacoustic image and the second photoacoustic image with the first ultrasonic image based on the relationships with the first time point, the second time point, and the third time point.SELECTED DRAWING: Figure 6【課題】 光音響画像よりも高いフレームレートで取得される超音波画像のそれぞれに対して、光音響画像を対応づけることのできる装置を提供する。【解決手段】 情報処理装置は超音波画像を光音響画像よりも高いフレームレートで取得し、第１の時点の第１光音響画像と、第１の時点より後の第２の時点の第２光音響画像と、第１の時点より後かつ第２の時点より前の期間に含まれる第３の時点の第１超音波画像とを取得し、第１の時点、第２の時点および第３の時点との関係に基づいて、第１超音波画像に対して、第１光音響画像及び第２光音響画像の少なくともいずれかの光音響画像を対応づける。【選択図】 図６
