| 摘要 |
PROBLEM TO BE SOLVED: To provide a phase detection type radiographic X-ray apparatus with which it is possible to establish an interference condition under different X-ray energies and take a photograph with discretionary X-ray energy.SOLUTION: A radiographic X-ray apparatus includes, between an X-ray source 101 and an X-ray detector 106, first to third grading units 103, 104, and 105 that are arranged in order from the X-ray source. Each of the first and third grating units 103, 105 comprises a plurality of grating members, and the in-plane rotation of the plurality of grating members generates a moire fringe in which an X-ray shielding part and an X-ray transmitting part are alternately arrayed. The repetition cycle of the shielding and transmitting parts of the moire fringe is changed by adjusting the relative rotation angles of the gratings in accordance with X-ray energy, whereby an interference condition is established.SELECTED DRAWING: Figure 1 |
