Abstract: An aperture device defines X-ray beams emitted from X-ray focal points L and R spaced apart from each other along the first direction. This defining operation is performed along the first direction and a second direction crossing the first position, thereby shaping a rectangular X-ray radiation area. Blades defining the two edges of the X-ray beam along the first direction and blades defining two edges of the X-ray beam along the second direction are supported by engaging portions into which screw portions of screw rods are screwed and engaging portions slidably fitted around round portions of the screw rods, respectively. When the screw rods are rotated by activation of corresponding stepping motors, the corresponding engaging portions are moved parallel to the screw rods. The respective blades can be variably moved along the first or second direction, thereby forming an X-ray radiation area having any shape in any position.

Abstract: Disclosed is an X-ray apparatus having an X-ray source, an X-ray imaging device in confronting relation to the X-ray source, a first support constructed and arranged for performing generally longitudinal movements for supporting the X-ray source, a second support constructed and arranged for performing generally longitudinal movements for supporting the X-ray imaging device, a first movable base for mounting the first support, a second movable base independent of the first movable base for mounting the second support, and a connector releasably interconnecting the support at a predetermined distance for allowing the support as interconnected to be operated in unison.