Patent ID: 7916832

Claim:
A radiographic imaging apparatus which conducts phase contrast radiographing, the radiographic imaging apparatus comprising: a radiation source whose focus size D is 30 (μm) or more; a detector holding device which holds a radiation image detector for detecting a radiation which emitted from the radiation source and which has been transmitted through a subject; a subject table which is used for fixing the subject and which is arranged between the radiation source and the detector holding device, and can be mounted after selection from a plurality of different sizes; a holding device for keeping a distance between the radiation source and the detector holding device to be constant; an adjusting device which adjusts relative distances of the subject table to the radiation source and to the radiation image detector; a subject table size information acquiring device which acquires size information about the subject table mounted; a control device which controls the adjusting device based on the acquired subject table size information; and wherein the radiographic imaging apparatus conducts the phase contrast radiographing under a condition of R 1 ≧(D−7)/200 (m) when R 1 represents a distance from the radiation source to the subject.