1. A method for automatically producing a temporally processed image, the method comprising the steps of: preparing a storage unit, said storage unit storing thereon a plurality of radiographic images, said plurality of radiographic images being taken at different points of time; capturing a new radiographic image; and automatically producing, in response to the capturing step, a specified number of temporally processed images according to a predetermined number of pairs of the radiographic images, said pairs of the radiographic images including the captured radiographic image, said predetermined number of pairs of the radiographic images being previously specified.