A console structure in an X-ray imaging system performs image processing of plural radiation images formed by an X-ray imaging apparatus having an active pixel area with pixels for detecting a radiation image of a body. The plural radiation images are formed by imaging one object in the body with a time interval. The console structure acquires the radiation images. An information controller obtains field information of a position of an exposure field which is associated with each one of the radiation images and automatically set in the active pixel area according to a position of the body being positioned for automatic exposure control in the X-ray imaging apparatus before imaging. A matching unit performs position matching according to the field information to match the position of the body in the plural radiation images between plural display images corresponding to respectively the plural radiation images.
