PROBLEM TO BE SOLVED: To grasp what time-dependent change represented by a difference image is. An image processing apparatus disclosed in the present specification relates to the passage of time of a part of a part commonly included in a first image and a second image obtained by imaging a subject at different times. In an image processing apparatus that supports the detection of change, an acquisition unit that acquires a difference image between the first image and the second image that shows the change over time as a difference, and the name of the part included in common Recording means for recording information indicating a part of the part having a different name in the storage section in association with the difference image. [Selection diagram]【課題】 差分画像が示す経時変化が何の経時変化であるかを把握可能とする。【解決手段】 本明細書に開示の画像処理装置は、被検体を互いに異なる時刻に撮像して得られた第１の画像と第２の画像とに共通して含まれる部位の一部の経時変化の検出を支援する画像処理装置において、前記経時変化を差分として示す前記第１の画像と前記第２の画像との差分画像を取得する取得手段と、前記共通して含まれる部位の名称とは異なる名称の前記部位の一部を示す情報を前記差分画像と対応付けて記憶部に記録する記録手段と、を備えることを特徴とする。【選択図】 図１
