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.
Claims13
A multi-X-ray generator comprising:
- a chamber;
- a plurality of electron emission elements provided inside said chamber;
- an acceleration unit provided inside said chamber, and configured to accelerate electron beams emitted from said plurality of electron emission elements;
- and
- a target portion which is irradiated with the electron beams, wherein said target portion is provided inside said chamber and in correspondence with the electron beams;
- a first X-ray shielding unit provided on an X-ray ejection side of said target portion;
- and
- a second X-ray shielding unit which is provided outside said chamber and is configured to be replaced in an atmosphere;
- and
- a third X-ray shielding unit provided inside said chamber and provided on an electron beam irradiation side of said target portion,
- wherein X-rays generated from said target portion are extracted as multi-X-ray beams into the atmosphere through the first and second X-ray shielding units, and
- wherein said third shielding unit is configured to suppress scattered X-rays and reflected electron beams, and comprises an incident hole for an electron beam.
A multi-X-ray imaging apparatus comprising a multi-X-ray generator,
- said multi-X-ray generator comprising
- a chamber,
- a plurality of electron emission elements provided inside said chamber,
- an acceleration unit provided inside said chamber, and configured to accelerate electron beams emitted from said plurality of electron emission elements,
- a target portion which is irradiated with the electron beams, wherein said target portion is provided inside said chamber and in correspondence with the electron beams,
- a first X-ray shielding unit provided on an X-ray ejection side of said target portion,
- a second X-ray shielding unit which is provided outside said chamber and is configured to be replaced in an atmosphere, and
- a third X-ray shielding unit provided inside said chamber and provided on an electron beam irradiation side of said target portion,
- wherein X-rays generated from said target portion are extracted as multi-X-ray beams into the atmosphere through the first and second X-ray shielding units, and
- wherein said third shielding unit is configured to suppress scattered X-rays and reflected electron beams, and comprises an incident hole for an electron beam, and
- said apparatus detecting, imaging, and diagnosing an X-ray transmission image of the X-ray beams obtained by irradiating an object with the multi-X-ray beams.
Dependencies are inferred from the claim text.