Abstract: An X-ray tube for radiating an X-ray to an object and a detector for detecting the X-ray transmitted through the object are mounted on both ends of a C-shaped arm. The arm is supported by an arm holder such that the C-shaped arm can be slid along an arc portion of the C-shaped arm. The arm holder having a horizontal portion which is supported by a supporting member such that the arm holder rotates around the horizontal portion. The supporting member is suspended from the ceiling via a pole such that the supporting member rotates around the pole and moves in the X and Y directions. When the supporting member is rotated, the supporting member is moved in the X and Y directions in accordance with an angle of rotation such that the C-shaped arm rotates around an isocenter at which a center axis of a circle including the arc portion of the C-shaped arm crosses the horizontal axis of rotation of the arm holder.

Abstract: In a radiation-type diagnosis apparatus, a plurality of imaging plates, each provided with bar codes, are received in a magazine and the magazine is set in a first storage section of the apparatus. In the first storage section, a photo detector for detecting the presence or absence of the bar code is located above the magazine to determine whether or not the imaging plate is positioned currently in the magazine. When the imaging plate is correctly located in the magazine, the imaging plate is transfer to a recording region in which an image of a region of interest is photographed.