1. A radiographic imaging assistance device comprising: an acquisition component that acquires position information representing positions of defective pixels of an imaging device, the imaging device being plurally provided with pixels comprising detection elements which detect radiation that has passed through a subject of imaging, and the imaging device carrying out imaging by generating image information which represents a radiographic image in accordance with radiation amounts detected by the detection elements and storing the image information in a pre-specified storage region; a judgment component that, on the basis of detection region information, which represents a detection region with a size corresponding to the subject of imaging, and the position information acquired by the acquisition component, judges whether or not an influence from the defective pixels in a detection region that is represented by the detection region information is within an acceptable level that accepts imaging a radiographic image; and a control component that performs control such that information based on a judgment result judged by the judgment component is displayed at a display component or notified to an external device.