| 摘要 |
PURPOSE:To prevent drop of the resolution due to half shade blur produced on a projective image of the TV fluoroscopic photographing by setting any the displaying magnification of a TV fluoroscopic image, and displaying the photographing conditions incl. the magnification together with the fluoroscopic image. CONSTITUTION:Rays from an X-ray tube 1 are cast onto an object 2, and the transmitted rays are put incident to an X-ray image intensifier 3. The intensifier 3 converts the image from the object 2 once into an optical image due to visible rays, and image due thereto is formed on the photographing plane of a TV camera 6 through a collimator lens 4 and imaging lens 5, and the formed image is photographed by the TV camera 6 under control of a camera controller 17 and processed by an image processing circuit 18 upon conversion into video signals. Thus a high S/N image is obtained, and displayed as a visible TV fluoroscopic image on the screen 35 of a monitor 24 through an image display circuit 19, or recorded as a hard copy by a video printer 25. Therein the record/ display magnification depends upon the distance between the X-ray tube 1 and the object 2. |
