Patent ID: 8213569

Claim:
An X-ray diagnosis apparatus comprising: an X-ray tube configured to generate X-rays to an examination target having a particular directionality; an X-ray detecting unit configured to detect X-rays penetrated through the examination target; an X-ray collimating unit including a plurality of aperture blades for setting an irradiation region of the X-rays generated from the X-ray tube; a driving unit configured to rotationally move the X-ray tube and the X-ray detecting unit; an image data generating unit configured to generate image data by performing a reconstruction process based on projection data detected in correspondence with the rotational movements along a plurality of different imaging directions by the X-ray detecting unit; a region of interest setting unit configured to set up a region of interest on the examination target portion; and an X-ray aperture controlling unit configured to control the X-ray collimating unit so as to slide and turn the aperture blades in correspondence with the rotational movements, based on the set up data of the region of interest and the imaging direction, wherein in the X-ray collimating unit each aperture blade has a shape in which its thickness increases moving away from its inner edge closest to the region of interest, and each aperture blade includes a plurality of shield plates stacked on top of each other in a thickness direction, and each shield plate is movable in a planar direction perpendicular to the thickness direction.