| 摘要 |
PROBLEM TO BE SOLVED: To permit imaging by a practically high tube current even if a small focus point X-ray tube is used. SOLUTION: When an X-ray tube is pulse-driven by first and second tube currents made at a prescribed duty ratios, the X-ray CT scanner can photograph scanning portions necessary for image reconstitution by high tube currents by setting the first tube current greater than an average tube current and the second tube current smaller than the average tube current to the extent that an anode temperature does not exceed a prescribed threshold value Qm at the time when the X-ray tube is continuously operated by the average tube current. COPYRIGHT: (C)2008,JPO&INPIT |
