A radiographic apparatus includes a radiation source for emitting radiation, a radiation detecting device with detecting elements arranged two-dimensionally, a radiation grid with absorbing foil strips for removing scattered radiation, a physical quantity acquiring device for calculating predetermined physical quantities based on outputs of the radiation detecting device, a physical quantity map generating device for generating a physical quantity map by mapping the predetermined physical quantities, and a physical quantity map smoothing device for smoothing the physical quantities arranged on the physical quantity map in a direction of extension of the absorbing foil strips, thereby to generate an average value map.
