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Electron emitter assembly and method for generating electron beams

A technology of electron emitters and electron beams, which is applied in X-ray tube cathode components, instruments for radiological diagnosis, electrical components, etc., and can solve problems such as expensive manufacturing, high gravity, and complex structures

Active Publication Date: 2006-06-21
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A related problem with this CT imaging system is that the gantry exerts a relatively large gravitational force on the internal electron emitter device, which can degrade the device
Furthermore, the gantry has a relatively complex structure and its manufacture is relatively expensive

Method used

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  • Electron emitter assembly and method for generating electron beams
  • Electron emitter assembly and method for generating electron beams
  • Electron emitter assembly and method for generating electron beams

Examples

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Embodiment Construction

[0022] refer to figure 1 and 2 , shows a CT imaging system 10 for generating a digital image of a target object, according to an exemplary embodiment. The CT imaging system 10 includes a CT scanning device 12 and a platform 14 .

[0023] CT scanning device 12 is configured to generate a plurality of digital images of a target object. The CT scanning device 12 includes light-emitting components 20, 22, 24, X-ray source components 26, 28, 30, X-ray detector arrays 40, 42, 44, X-ray controller 50, data acquisition system 52, image reconstruction device 54, Platform movement controller 56 , external memory 58 , keyboard 60 , display 62 , and computer 64 . It should be noted that in alternative embodiments, the CT scanning apparatus 12 may have more or less than three X-ray source assemblies. Furthermore, the CT scanning device 12 may have more or less than three x-ray detector arrays.

[0024] The light emitting assemblies 20, 22, 24 are arranged to emit light beams which cau...

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Abstract

Electron emitter assemblies and methods for generating an electron beam are provided. The electron emitter assembly includes a laser (80) configured to emit a first beam (96) and a second beam (98). The electron emitter assembly also includes a mirror (92) configured to move to a first operative position to reflect a first light beam (96) to a first region (122) of the photocathode (116). The mirror (92) is also configured to move to a second operative position to reflect the second light beam (98) to a second region (140) of the photocathode (116). The photocathode (116) is arranged to emit a first beam of electrons (126) when the first beam (96) contacts the first area (122) and a second electron beam (98) when it contacts the second area (140). Electron Beam (144). The electron emitter assembly also includes an anode (118) positioned to receive the first and second electron beams (126, 144) from the photocathode (116).

Description

technical field [0001] The invention relates to an electron emitter assembly and a method for generating an electron beam. Background technique [0002] In a computed tomography (CT) imaging system, an x-ray source arrangement and a detector array placed on a gantry are used to generate images of an object. The X-ray source device includes an electron emitter device that emits an electron beam toward a target. When the electron beam contacts the substrate, the substrate emits X-rays. The gantry rotates the X-ray source assembly and detector around the object in the imaging plane, thereby continuously changing the angle at which the X-ray beam intersects the object. [0003] A problem associated with this CT imaging system is that the gantry exerts a relatively large gravitational force on the internal electron emitter device, which can degrade the device. Furthermore, the stand has a relatively complex structure and its manufacture is relatively expensive. [0004] There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03G01N23/00
CPCA61B6/032A61B6/4028H01J35/065H01J2235/064
Inventor B·M·敦哈姆J·S·普赖斯C·R·威尔逊
Owner GENERAL ELECTRIC CO
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