Patent ID: 8094776

Claim:
A tomosynthesis radiographing apparatus, comprising; a radiation emission unit having multiple radiation sources for emitting radiation onto a subject, the radiation sources being distributed such that radiation emitted from each radiation source and transmitted through the subject forms a part of a projected image of the subject; a radiation image detector for detecting radiation emitted from each radiation source of the radiation emission unit; and a tomographic image generation unit for generating a tomographic image of the subject based on detection information detected by the radiation image detector when radiation is emitted onto the subject from different positions by the radiation emission unit, wherein each radiation source emits fan beam radiation and is disposed such that a plane of the fan beam having a wider spread angle intersects with an arrangement direction of the multiple radiation sources and is arranged parallel to each other; further comprising: a first diffraction grating configured to be exposed to radiation emitted from the multiple radiation sources of the radiation emission unit and to produce Talbot interference or Talbot-Lau interference by the exposure; and a second diffraction grating for diffracting radiation diffracted by the first diffraction grating, wherein: the first diffraction grating is disposed such that an extension direction of a diffraction member constituting the first diffraction grating corresponds to a spreading direction of the fan beam in the plane having a wider spread angle and the second diffraction grating is disposed such that an extension direction of a diffraction member constituting the second diffraction grating corresponds to the spreading direction of the fan beam in the plane having a wider spread angle; and the radiation image detector is a detector that detects radiation diffracted by the second diffraction grating.