| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an X-ray photographing apparatus in which the flexibility of a subject irradiation X-ray passing area is increased. <P>SOLUTION: At a position where a part of X-rays capable of passing through a large irradiation field X-ray passing hole C1 can be shielded by a peripheral shielding area P3 under a small irradiation field X-ray passing hole C3 of a vertical direction displacement X-ray shielding plate XK2, the z direction of the vertical direction displacement X-ray shielding plate XK2 is position-set. In the state, the large irradiation field X-ray passing hole C1 of a horizontal direction deviation X-ray shielding plate XK1 and the small irradiation field X-ray passing hole C3 of the vertical direction displacement X-ray shielding plate XK2 do not overlap with each other at all on a zy plane. Thus, of the large irradiation field X-ray passing hole C1 of the horizontal direction deviation X-ray shielding plate XK1, only an area not shielded by the peripheral shielding area P3 of the vertical direction displacement X-ray shielding plate XK2 becomes a subject irradiation X-ray passing area. <P>COPYRIGHT: (C)2013,JPO&INPIT |
