| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve controllability of X-ray generation in a triode X-ray tube. <P>SOLUTION: This X-ray computed tomography apparatus includes: an X-ray tube 121 having a negative electrode 124, a positive electrode 122, and a bias electrode 125; an X-ray detector 14; an image reconstruction part 23; a high voltage power supply 131 generating a tube voltage; a filament heating power supply 132; a bias power supply 133; and an X-ray control part 16 controlling the high voltage power supply, the filament power supply, and the bias power supply. The X-ray control part makes the tube voltage be continuously applied, makes a filament current be continuously supplied, makes a bias voltage be applied as a pulse train, and varies at least one of a pulse repetition frequency and a pulse width of the bias voltage with time. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
