Multi X-ray generator and multi X-ray imaging apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasahiko Okunuki, Osamu Tsujii, Takeo Tsukamoto
Life of this patent
Estimating the term…
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.
Claims2
A multi X-ray generator comprising a plurality of electron emission elements, an acceleration unit 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 in correspondence with the electron beams, said target portion comprises an X-ray shielding unit, and X-rays generated from said target portion are extracted as multi X-ray beams into an atmosphere, wherein a distance d between the multi X-ray beams has a relationship of d>2D·tan α where D is a distance from said target portion to an extraction position for extraction of the multi X-ray beams into the atmosphere and α is a radiation angle of an X-ray beam from said X-ray shielding unit.
Dependencies are inferred from the claim text.