| 摘要 |
PURPOSE: To provide a Bucky's device by which an X ray radiation axis in gradient photography can be aligned simply and accurately with the center of a film loaded therein. CONSTITUTION: An arithmetic circuit 5 calculates a ratio i/D wherein D is a distance between an X-ray focus (f) and a film and (i) is a horizontally moving distance (in the longitudinal direction of a top board) from a vertical axis running through the center R of a Bucky's device (center of a film). The resultant calculation signal i/D undergoes a radian comparison using a comparator 5 with an angleθof rotation (oscillation) of an X-ray tube unit X centered on a horizontal axis running through the X-ray focus (f), and a display lamp 6 is turned on by a coincidence signal of the comparator 5.
|
