Title:
X-RAY GENERATING TUBE, X-RAY GENERATING APPARATUS, AND RADIOGRAPHY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/040829
Kind Code:
A4
Abstract:
The present invention provides an X-ray generating tube including a transmission target having a minute focal spot. The X-ray generating tube includes a transmission target having a first surface and a second surface opposite to the first surface, the first surface being irradiated with an electron beam, and the target radiating X-rays from the second surface; an electron emitting source emitting the electron beam in such a manner that the electron beam obliquely enters the first surface; and a tubular forward shield member located at the second surface side of the target to define an extraction angle of an extracted X-ray beam. The forward shield member is disposed such that a central axis of the electron beam and a central axis of the X-ray beam whose extraction angle is defined are located at the same side with respect to a virtual normal plane perpendicular to the first surface and a projection central axis that is a projection of the central axis of the electron beam to the first surface.
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Inventors:
UTSUMI KAZUSHIGE (JP)
ITO NOBUHIRO (JP)
UEDA KAZUYUKI (JP)
TSUJINO KAZUYA (JP)
ITO NOBUHIRO (JP)
UEDA KAZUYUKI (JP)
TSUJINO KAZUYA (JP)
Application Number:
PCT/JP2014/004659
Publication Date:
July 23, 2015
Filing Date:
September 10, 2014
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
H05G1/02; A61B6/02; G21K1/02; H01J35/08
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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