Digital X-ray photography device

A rotational stereoscopic photographing method, in a digital X-ray photography device, comprising a body gantry installed on a floor surface and having an opening for inserting a subject table therein in a horizontal direction at almost a center portion of a standing portion, a ring-shaped rotation supporting unit rotatably provided around said opening within said body gantry, and an X-ray tube unit for radiating X-rays and an image system unit for converting an optical transmission X-ray image into an image signal at positions facing each other by sandwiching said opening on said rotation supporting unit, including the steps of:

• setting said rotation supporting unit at a first position;
• accelerating said rotation supporting unit from said first position to a second position;
• rotating said rotation supporting unit at a predetermined speed from said second position to a third position;
• radiating pulse-shaped X-rays and reading image data in a constant cycle from a time when said rotation supporting unit passes through said second position;
• reducing rotation of said rotation supporting unit when said rotation supporting unit has come to said third position and stopping rotation at a fourth position;
• accelerating and rotating said rotation supporting unit in a backward direction from said fourth position to said third position;
• rotating said rotation supporting unit at said predetermined speed from said third position to said second position;
• synchronizing radiation of X-rays and reading of images at said third position and thereafter continuing radiation of pulse-shaped X-rays and reading of image data in said predetermined cycle;
• and
• reducing and then stopping speed of rotation of said rotation supporting unit when said rotation supporting unit has come to said second position.