Patent ID: 9418816
Filing Date: 2016-08-16
CPC Classification: A61B,H01J,H05G

Claim Text:
1. An X-ray tube comprising: a first electron generator configured to emit a first electron beam; a second electron generator configured to emit a second electron beam that is different in energy from the first electron beam; an X-ray generator including a first surface, the X-ray generator configured to generate a first X-ray upon receipt of the first electron beam, and generate a second X-ray upon receipt of the second electron; and a deflector configured to selectivety deflect the first electron beam such that the first surface receives the first electron beam or a surface other than the first surface receives the first electron beam, wherein when the first surface receives the first electron beam, the first X-ray is thereby irradiated toward a predetermined irradiation field, and when the surface other than the first surface receives the first electron beam, the first X-ray is thereby irradiated in a direction different from direction of the predetermined irradiation field.