| 摘要 |
PURPOSE:To simplify the scan preparatory operation of an operator, and make high special resolution securable in addition, by accelerating a rotor up to the specified revolving speed gradually by a sensor which detects whether a subject is placed on a bed or not, or decelerating the rotor by degrees and stopping it. CONSTITUTION:When a patient gets on a bed, a sensor detects it, and a controller 50 starts rotation of a rotor 10, whereby this rotor 10 is slowly accelerated. And, about the time when patient's positioning or the like has finished, the rotor 10 reaches the specified speed and an X-ray rube 20 comes into a state of being appliable, thus scanning can be done. When the patient alights from the bed after the scan, the sensor 41 detects it, the controller 50 slowly decelerates rotation of the rotor 10, and it is stopped after 30 seconds. With this constitution, scan preparatory operation of an operator is simplifiable, and at the scan, the rotor reaches the specified revolution so that X-rays on a small focal point are emitted and thus high special resolution is securable.
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