| 摘要 |
A radiographic apparatus includes a first grating, a second grating, a scanning unit, and a radiological image detector. The second grating includes a periodic form that has a period which substantially coincides with a pattern period of a radiological image formed a radiation having passed through the first grating. The scanning unit relatively displaces the radiological image and the second grating to a plurality of relative positions at which phase differences between the radiological image and the second grating are different each other. The radiological image detector detects the radiological image masked by the second grating. The scanning unit includes a driving unit that drives one of the first grating and the second grating relatively to the other in a pattern arrangement direction of the radiological image and a plurality of elastic members that has natural frequencies different from each other.
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