The image processing device according to the present invention is a two-dimensional information input unit that receives an input of three-dimensional structure information indicating a three-dimensional structure of the heart An image generation unit that develops the two-dimensional image into images and divides the two-dimensional image into a front wall, a rear wall, a left side wall, and a right side wall to generate a developed image.本発明に係る画像処理装置は、心臓の立体構造を示す三次元構造情報の入力を受け付ける情報入力部と、三次元構造情報で示される心臓の房室の内壁を、正積図法に基づいて二次元画像に展開し、該二次元画像を前壁、後壁、左側壁および右側壁に分けて断裂した展開画像を生成する画像生成部と、を備える。
