| 摘要 |
<p>An X-ray tube device capable of outputting an X-ray of a dose suitable for radiographing for an extended time, wherein minor focal point-use filaments (72, 73) are installed on the opposite sides of a major focal point-use filament (71) such that distances from the center of the major focal point-use filament (71) are nearly equal, and inclination angles between converging electrodes (70b, 70c) enclosing the surroundings of individual minor focal point-use filaments and a cathode body (7a) are set to an almost equal angle ranging from 20 to 40°.</p> |
