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X-ray generator and X-ray imaging apparatus

An X-ray and generator technology, applied in the field of transmission type X-ray generators, can solve problems such as low X-ray generation efficiency, and achieve the effect of improving X-ray generation efficiency

Inactive Publication Date: 2014-04-30
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In general, in a transmission type X-ray generator that emits electrons at a transmission target and causes X-rays to be generated, X-ray generation efficiency is significantly low

Method used

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  • X-ray generator and X-ray imaging apparatus
  • X-ray generator and X-ray imaging apparatus
  • X-ray generator and X-ray imaging apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0028] Figure 1A is a sectional view of an exemplary configuration of a transmission type X-ray generator (hereinafter, “X-ray generator”) 18 according to this embodiment. Figure 1B yes Figure 1A An enlarged cross-sectional view of anode 10 is shown. Figure 1C is viewed from the target side Figure 1A A plan view of the target area 9 is shown.

[0029] The X-ray generator 18 includes the X-ray source 1 and the driving power source 15 provided in the housing 16 and the insulating oil 14 filling the remaining space in the housing 16 . The housing 16 has an X-ray extraction window 17 .

[0030] The X-ray source 1 includes an electron source 3 , an anode 10 , a getter 12 and a vacuum container 6 .

[0031] The electron source 3 includes a current introduction terminal 4 and an electron emission portion 2 . The mechanism of the electron source 3 for emitting electrons may be any electron source capable of controlling the amount of electrons emitted from the outside of the va...

no. 2 example

[0053] will refer to the attached Figure 2A and Figure 2B A second embodiment is described. Figure 2A is a cross-sectional view of a target region in the transmission type X-ray generator of this embodiment. Figure 2B is viewed from the target side Figure 2A A floor plan of the target area.

[0054]The X-ray generator of this embodiment has the same components as the first embodiment, and has the same configuration as the first embodiment except for the target area 9 . Such as Figure 2A As shown, the target area 9 is configured such that a target 9c is provided at a central area on the substrate 9a, and a conductive layer 9b is provided on the substrate 9a in an area other than the central area. The target 9c is connected to the conductive layer 9b. The materials of the substrate 9a, the conductive layer 9b and the target 9c can be selected in the same manner as described in the first embodiment.

no. 3 example

[0056] Figure 2C is a cross-sectional view of the target area in the X-ray generator of this embodiment. Figure 2D is viewed from the target side Figure 2C A floor plan of the target area.

[0057] The X-ray generator of this embodiment has the same components as the first embodiment, and has the same configuration as the first embodiment except for the target area 9 . Such as Figure 2C As shown, the target area 9 of this embodiment is configured such that the target 9c is provided at the central area on the substrate 9a, and the conductive layer 9b is provided on the substrate 9a and at the target in areas other than the central area. on 9c. The target 9c is covered by a conductive layer 9b. The materials of the substrate 9a, the conductive layer 9b and the target 9c can be selected in the same manner as described in the first embodiment.

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PUM

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Abstract

Provided is an X-ray generator which includes: an electron path 8; a target 9c disposed on a substrate 9a, in which electrons (5a) having passed through the electron path 8 are made to emit at the target 9c and to generate an X-ray (11a), wherein: the target 9c is disposed at the central area of the substrate 9a; at least a part of a peripheral area of the substrate 9a which is not covered with the target 9c has higher transmittance than that of the central area of the substrate 9a covered with the target 9c, with respect to the X-ray ( 11b) generated when electrons (5b) having reflected from the target enter an inner wall of the electron path. X-ray generation efficiency may be improved by effectively using electrons reflected off the target 9c.

Description

technical field [0001] The present invention relates to a transmission type X-ray generator applicable to radiography for diagnosis in the medical field, non-destructive testing in the field of industrial machinery, and other uses. The present invention also relates to an X-ray imaging device to which the transmission type X-ray generator is applied. Background technique [0002] Generally, in a transmission type X-ray generator that emits electrons at a transmission target and causes X-rays to be generated, X-ray generation efficiency is significantly low. When electrons are accelerated to high energy and emitted at the transmitted target so that X-rays are generated, the energy ratio of electrons that become X-rays is only 1% or less of all electrons that collide with the transmitted target, and the rest of the electrons are approximately 99% or more becomes heat. Therefore, improvements in X-ray generation efficiency are desired. When electrons collide with a transmitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/08
CPCH01J2235/087H01J35/08H01J2235/186G01N23/04H01J35/14H01J35/116H01J35/186H01J35/02
Inventor 小仓孝夫佐藤安荣
Owner CANON KK
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