| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray photographing device in which an X-ray magnification ratio can be reduced by reducing a deformation amount when the focusing distance of a scattered-ray removing grid is changed. SOLUTION: A focusing grid 31 is provided in the vicinity of an incident face of an image receiving part 15 for receiving an image of the X-rays irradiated from an X-ray tube 13 to remove the X-rays scattering inside a subject. Both end parts in the grid arrangement direction of the focusing grid 31 are vertically moved by a grid driving device 40 to deform the focusing grid 31 into a cylindrical shape with a prescribed curvature. The prescribed curvature is determined so that an X-ray cutoff amount at both end parts in the grid arrangement direction becomes minimum corresponding to the SID. COPYRIGHT: (C)2005,JPO&NCIPI
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