PROBLEM TO BE SOLVED: To provide a subject information acquisition device capable of reducing the influence of non-uniformity of a sound speed with a small amount of calculation.SOLUTION: A subject information acquisition device includes: a holding member 130 for holding a subject 100； a probe 140 for detecting an acoustic wave generated in a subject 100 and transmitted through the holding member 130 at multiple positions, and acquiring multiple time-series detection signals； and a signal processing unit 150 for acquiring a first frequency signal on the basis of the multiple time-series detection signals, acquiring a second frequency signal where phase modulation is corrected by performing the correction of the phase modulation in the acoustic waves caused by the holding member 130 with respect to the first frequency signal, and acquiring subject information in the subject on the basis of the second frequency signal with the phase modulation corrected therein.COPYRIGHT: (C)2015,JPO&INPIT【課題】少ない計算量で音速の不均一性の影響を低減することのできる被検体情報取得装置を提供する。【解決手段】被検体情報取得装置は、被検体１００を保持する保持部材１３０と、被検体内１００で発生し保持部材１３０を伝搬した音響波を複数の位置で検出して複数の時系列の検出信号を取得する探触子１４０と、複数の時系列の検出信号に基づいて第一の周波数信号を取得し、第一の周波数信号に対して保持部材１３０に起因する音響波の位相変調の補正を行うことにより位相変調が補正された第二の周波数信号を取得し、位相変調が補正された第二の周波数信号に基づいて、被検体内の被検体情報を取得する信号処理部１５０とを有する。【選択図】図１
