| 摘要 |
The purpose of the present invention is to provide an X-ray CT apparatus and imaging method that allow the throughput of an examination to be improved and wear of a bearing of a rotary disk to be suppressed. A system control device 124 of the X-ray CT apparatus 1 controls the rotation speed of the rotary disk 102 during a waiting time between successive imaging sequences. Specifically, the system control device 124 determines, on the basis of acceleration and deceleration times to each of the rotational speeds Sn, Sm determined for successive imaging sequences according to imaging conditions and a standby interval time Tint, whether a rotational speed control operation can be performed during these waiting times (delay time between sequences). When the operation is possible, the system control device 124 causes the rotary disk 102 to decelerate to a desired decelerated rotational speed or until rotation thereof is stopped, waits for a predetermined waiting time TIdle to elapse while rotation of the rotary disk 102 is maintained at the desired decelerated rotational speed or stopped, and then accelerates the rotational speed to a rotation speed for the following sequence. |
