| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To optimize switching control of a voltage applied to an X-ray tube such that contrast of an obtained image becomes large, in an X-ray CT (Computed Tomography) apparatus including the X-ray tube wherein a positive voltage is applied to a positive electrode and a negative voltage is applied to a negative electrode, and photographing a target while changing over the X-ray tube voltage to a plurality of set voltages. <P>SOLUTION: An X-ray CT apparatus includes: a first voltage generator generating the positive voltage applied to the positive electrode of the X-ray tube, and changing over the positive voltage to a prescribed voltage according to a positive voltage switching signal based on an X-ray tube voltage switching signal; a second voltage generator generating the negative voltage applied to the negative electrode of the X-ray tube, and changing over the negative voltage to a prescribed negative voltage according to a negative voltage switching signal based on the X-ray tube voltage switching signal; and a control section controlling switching timing in at least one of the positive voltage switching signal and the negative voltage switching signal such that a time lag amount between timing wherein the generated positive voltage is switched to the prescribed positive voltage and timing wherein the generated negative voltage is switched over to the prescribed voltage becomes small. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
