Method and apparatus for applying material to a surface of an anode of an x-ray source, anode and x-ray source

An X-ray and X-ray tube technology, which is used in the fields of anode surfaces and devices for applying materials to X-ray sources, anodes and X-ray sources, to reduce the number of light sources and avoid contamination

Inactive Publication Date: 2010-07-14
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, due to the reduced thickness of the anode by conventional repair methods, the electron optics within the X-ray source may have to be adjusted to accommodate the changed position of the X-ray emitting surface of the anode after each repair process

Method used

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  • Method and apparatus for applying material to a surface of an anode of an x-ray source, anode and x-ray source
  • Method and apparatus for applying material to a surface of an anode of an x-ray source, anode and x-ray source
  • Method and apparatus for applying material to a surface of an anode of an x-ray source, anode and x-ray source

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Embodiment Construction

[0063] figure 1 An X-ray tube arrangement comprising a disc anode 101 and an electron source 105 is shown. Anode 101 is disk-shaped and includes a heavy metal such as tungsten, rhenium or molybdenum. At its circumferential edge 113 , the anode 101 comprises an inclined surface serving as an X-ray emitting surface 115 for emitting an X-ray beam 109 when irradiated by an electron beam 107 from an electron source 105 . At the focal locus 111 where the electron beam 107 strikes the X-ray emitting surface 115, cracks or pits may occur after continued operation of the X-ray tube.

[0064] Figures 2a to 2d shows that in the different processing steps of an embodiment of the method according to the invention figure 1 The area A around the focus locus 111 indicated in .

[0065] Such as Figure 2a As shown, a pit 121 formed on the focal track 111 can be detected and its depth can be measured using a laser beam 133 from a first laser 131 . as Figure 2a Indicated by the arrow, t...

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Abstract

A method and an apparatus for locally applying material to the surface of an anode of an X-ray source as well as a corresponding anode is presented. Anode material such as a repair material for filling a recess (121) in an X-ray emitting surface (115) is applied to the X-ray emitting surface of an anode (101). The location where such material is to be applied may be detected using a laser beam (133). The applied repair material including particles (41) of anode material such as tungsten, rhenium or molybdenum, is subsequently locally sintered using a high-energy laser beam (151). The sintered material may then be melted using a high-energy electron beam (163). Using such method, a damaged surface of an anode may be locally repaired. Alternatively, structures of different anode materials or of protrusions having different levels can be provided on the X-ray emitting surface (115) in order to selectively manipulate the X-ray emitting characteristics of the anode (101).

Description

technical field [0001] The present invention relates to a method and apparatus for applying material to the anode surface of an X-ray source. In particular, the invention relates to a method and a device for repairing an anode of an X-ray source or for providing a surface structure on the surface of an X-ray source. Furthermore, the invention relates to an anode having specific electro-optical properties and an X-ray source comprising such an anode. Background technique [0002] X-ray sources are used in various fields of application such as medical applications in which for example two-dimensional or three-dimensional images of a patient to be examined can be obtained using x-ray projections and corresponding x-ray detectors. In an X-ray source, an accelerated beam of electrons is directed onto the surface of an anode. When hitting the anode, the electrons are decelerated and X-rays are emitted. [0003] The structure of the X-ray emitting surface of the anode may be cri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/08
CPCH01J35/08H01J2235/083H01J2235/085H01J35/101
Inventor R·多沙伊德G·福格特米尔R·皮蒂格
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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