| 摘要 |
An X-ray generating apparatus controls driving of an X-ray tube. The X-ray tube includes an electron source emitting electrons due to application of a voltage, a transmission-type target generating an X-ray due to collision of electrons emitted from the electron source, and a shield member disposed between the electron source and the transmission-type target, the shield member having an opening that electrons emitted from the electron source pass through, and blocking an X-ray that scatters toward the electron source. When generating the X-ray, application of a voltage to the transmission-type target is started, and emission of electrons from the electron source is caused after passage of a predetermined period indicating a time period from starting voltage application until the transmission-type target reaches a predetermined voltage. When stopping X-ray generation, application of the voltage to the transmission-type target is stopped after stopping the emission of electrons from the electron source. |
| 主权项 |
1. An X-ray radiography apparatus, comprising:
an X-ray generator which generates an X-ray, an X-ray detector which detects an X-ray from said X-ray generator that has been transmitted through a subject, a controller which controls said X-ray generator and said X-ray detector, wherein said X-ray generator has an X-ray tube comprising an electron source configured to emit electrons in response to application of a voltage, a transmission-type target configured to generate the X-ray due to collision of electrons emitted from said electron source, and a shield member disposed between said electron source and said transmission-type target, said shield member having an opening through which electrons emitted from said electron source pass, said shield member being configured to block an X-ray that scatters toward said electron source, and said controller, when generating the X-ray, starts application of a voltage between said transmission-type target and said electron source, and causes emission of electrons from said electron source after passage of a predetermined period from the start of voltage application until the voltage between said transmission-type target and said electron source reaches a predetermined voltage, and when stopping generation of the X-ray, stops application of the voltage between said transmission-type target and said electron source after stopping the emission of electrons from said electron source.
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