A radiographic imaging apparatus comprising: a radiation source for irradiating radiation onto a subject; a radiation detector having a plurality of pixels each equipped with an accumulation means for generating electric charges upon receiving the radiation and accumulating the generated electric charges and a TFT switch for reading out the electric charges accumulated in the accumulation means, a plurality of scanning lines for turning the TFT switches ON/OFF, and a number of data lines for reading-out the electric charges accumulated in the accumulation means as image signals, and an image obtaining means for relatively moving the radiation source with respect to the radiation detector, irradiating the radiation onto the subject at a plurality of radiation source positions associated with the movement of the radiation source, and obtaining a plurality of images corresponding to each of the plurality of radiation source positions; the apparatus characterized by further including: a plurality of short-circuited pixels formed by short-circuiting TFT switches being arranged across the entire surface of the radiation detector; a short-circuited pixel setting means for setting a position of a detection short-circuited pixel to detect a dose of the radiation corresponding to each of the plurality of radiation source positions from among the plurality of short-circuited pixels; and a dose control means for controlling the dose of radiation output from the radiation source, based on electric signals read out from the detection short-circuited pixels, at each of the plurality of radiation source positions. a radiation source for irradiating radiation onto a subject; a radiation detector having a plurality of pixels each equipped with an accumulation means for generating electric charges upon receiving the radiation and accumulating the generated electric charges and a TFT switch for reading out the electric charges accumulated in the accumulation means, a plurality of scanning lines for turning the TFT switches ON/OFF, and a number of data lines for reading-out the electric charges accumulated in the accumulation means as image signals, and an image obtaining means for relatively moving the radiation source with respect to the radiation detector, irradiating the radiation onto the subject at a plurality of radiation source positions associated with the movement of the radiation source, and obtaining a plurality of images corresponding to each of the plurality of radiation source positions; the apparatus characterized by further including: a plurality of short-circuited pixels formed by short-circuiting TFT switches being arranged across the entire surface of the radiation detector; a short-circuited pixel setting means for setting a position of a detection short-circuited pixel to detect a dose of the radiation corresponding to each of the plurality of radiation source positions from among the plurality of short-circuited pixels; and a dose control means for controlling the dose of radiation output from the radiation source, based on electric signals read out from the detection short-circuited pixels, at each of the plurality of radiation source positions. a plurality of short-circuited pixels formed by short-circuiting TFT switches being arranged across the entire surface of the radiation detector; a short-circuited pixel setting means for setting a position of a detection short-circuited pixel to detect a dose of the radiation corresponding to each of the plurality of radiation source positions from among the plurality of short-circuited pixels; and a dose control means for controlling the dose of radiation output from the radiation source, based on electric signals read out from the detection short-circuited pixels, at each of the plurality of radiation source positions.