An image processing apparatus comprising: first image obtaining means for obtaining a first image of an object in a first shape state； region of interest setting means for setting a region of interest of the object on the first image； deformation information obtaining means for obtaining deformation information indicating deformation of the object from the first shape state to a second shape state； region calculating means for calculating a region in the second shape state corresponding to the region of interest in the first shape state based on the deformation information； and imaging region setting means for setting an imaging region of the object in the second shape state based on the region calculated by the region calculating means.
