Patent ID: 8472585

Claim:
An X-ray generating apparatus, comprising: an X-ray tube configured to generate an X-ray; and a controller configured to control driving of the X-ray tube; the X-ray tube comprising: an electron source configured to emit electrons due to application of a voltage; a transmission-type target configured to generate 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 the shield member being configured to block an X-ray that scatters toward the electron source; the controller being configured to, when generating the X-ray, start application of a voltage to the transmission-type target, and cause emission of electrons from the electron source after passage of a predetermined period indicating a time period from the start of voltage application until the transmission-type target reaches a predetermined voltage, and when stopping generation of the X-ray, stop application of the voltage to the transmission-type target after stopping the emission of electrons from the electron source.