Multi X-ray generator and multi X-ray imaging apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasahiko Okunuki, Osamu Tsujii, Takeo Tsukamoto
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Abstract
A compact apparatus can form multi-X-ray beams with good controllability. Electron beams (e) emitted from electron emission elements (15) of a multi-electron beam generating unit (12) receive the lens effect of a lens electrode (19). The resultant electron beams are accelerated to the final potential level by portions of a transmission-type target portion (13) of an anode electrode (20). The multi-X-ray beams (x) generated by the transmission-type target portion (13) pass through an X-ray shielding plate (23) and X-ray extraction portions (24) in a vacuum chamber and are extracted from the X-ray extraction windows (27) of a wall portion (25) into the atmosphere.
Claims7
A multi-X-ray generator comprising:
- a container whose interior space is evacuated;
- a plurality of electron emission elements arranged within said container;
- a target which is placed opposite said plurality of electron emission elements;
- a backward X-ray shielding unit placed on a side of the target, which faces said plurality of electron emission elements;
- and
- a forward X-ray shielding unit having a single plate and placed on the other side of said target, which is at an opposite side of said plurality of electron emission elements,
- wherein said target comprises a plurality of X-ray generating regions provided in correspondence with said plurality of electron emission elements, and each of said plurality of X-ray generating regions generates an X-ray beam to be output by irradiating an electron beam emitted from a corresponding one of said plurality of electron emission elements,
- wherein said backward X-ray shielding unit has a plurality of electron incident holes provided in correspondence with the plurality of X-ray generating regions, which allows the electron beam to get through,
- wherein said forward X-ray shielding unit has a plurality of apertures in correspondence with the plurality of X-ray generating regions, through which the X-ray beams are output, and
- wherein said plurality of apertures are each arranged on said single plate of said forward X-ray shielding unit.
Dependencies are inferred from the claim text.