Patent ID: 7556427

Claim:
An X-ray radiography apparatus comprising: a table having a transverse direction and a longitudinal direction, said table comprising a first X-ray detector and configured to carry a subject thereon; an X-ray generator configured to apply X rays to the subject placed on said table; and an X-ray generator moving device configured to move said X-ray generator in the longitudinal direction of said table and in an upward direction and in a downward direction, said X-ray generator moving device comprising: a guide rail disposed in the longitudinal direction and facing a side direction in the neighborhood of said table; a guide support post configured to guide said X-ray generator in the upward direction and in the downward direction; and a movable stage configured to move along said guide rail, said movable stage extending in a transverse direction and coupled to said guide rail at a first end, said movable stage having a length that is greater than a width of said guide support post; and an off-center arm coupled at a first end to said movable stage and at a second end to said guide support post, said off-center arm extending in the longitudinal direction, said off-center arm having a length that enables said off-center arm to support said guide support post outside from an edge portion of said guide rail when said movable stage is moved to the edge portion of said guide rail.