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US 9,412,552 B2Granted
Multi-source radiation generating apparatus and radiographic imaging system
AssigneeCanon Kabushiki Kaisha
InventorsShuji Aoki, Kazuyuki Ueda
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Abstract
In a multi-source radiation generating apparatus including a plurality of combinations of a cathode and a target, an extraction electrode is disposed for a plurality of cathodes in common. When a potential of the extraction electrode is constant, potentials for the cathodes are selectively switched between a cutoff potential which is higher than the potential of the extraction electrode and an emission potential which is lower than the potential of the extraction electrode.
Claims8
A radiation generating apparatus comprising:
- a radiation tube including a plurality of cathodes, a plurality of targets, and an extraction electrode, the plurality of cathodes being configured to emit electrons, the plurality of targets being disposed in a one-to-one correspondence with the plurality of cathodes and configured to output radiation in response to being irradiated by the electrons, and the extraction electrode being disposed between the plurality of cathodes and the plurality of targets and configured to operate at a potential applied thereto;
- and
- a driving controller configured to control driving of the radiation tube,
- wherein the driving controller performs switching between a cutoff potential, which is higher than the potential of the extraction electrode, and an emission potential, which is lower than the potential of the extraction electrode so that the cutoff potential and the emission potential are selectively applied to the plurality of cathodes.
1 more element
Dependencies are inferred from the claim text.