A flat filament for an X-ray CT tube

An X-ray and flat-panel technology, which is applied to X-ray tube components, X-ray tube electrodes, X-ray tube cathode components, etc.

Pending Publication Date: 2018-12-21
麦默真空技术无锡有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of flat fi...

Method used

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  • A flat filament for an X-ray CT tube
  • A flat filament for an X-ray CT tube
  • A flat filament for an X-ray CT tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 provides a flat filament used in an X-ray CT tube for generating directional electron beams, and its structural schematic diagram is shown in FIG. 2( a ). The flat plate filament for X-ray CT tube includes a flat plate and an emitting structure formed on the flat plate. The emission structure is a square ring structure formed by a plurality of slots. Wherein, the thickness of the flat plate is 0.05-0.3 mm.

[0031] Specifically, the emission structure is composed of a plurality of "bow"-shaped units, and the plurality of "bow"-shaped units are connected to form a square ring structure as shown in Figure 2(a). The emission structure adopts four pins, which makes the flat filament structure more stable.

[0032] The four pins are respectively a first pin 21 , a second pin 22 , a third pin 23 and a fourth pin 24 . The opposite two pins are both current output terminals, or both are current input terminals; one of the two adjacent pins is the current output ...

Embodiment 2

[0037] As shown in FIG. 3( a ), it is a flat filament for an X-ray CT tube provided in the second embodiment. The flat plate filament for X-ray CT tube includes a flat plate and an emitting structure formed on the flat plate. The difference from Embodiment 1 is that the emission structure is a square strip structure formed by a plurality of through grooves. Wherein, the thickness of the flat plate is 0.05-0.3 mm.

[0038] Specifically, the emission structure is composed of a plurality of "bow"-shaped units, and the plurality of "bow"-shaped units are connected to form a square strip structure as shown in Fig. 3(a). The emission structure adopts four pins, which can make the structure of the flat filament more stable, avoid stress deformation of the flat filament due to centrifugal force when the CT machine scans and rotate at high speed, and prolong the service life of the filament.

[0039]Same as the first embodiment, the four pins are the first pin 31 , the second pin 32 ...

Embodiment 3

[0044] As shown in FIG. 4( a ), it is a flat filament used in an X-ray CT tube provided by the third embodiment. The flat plate filament for X-ray CT tube includes a flat plate and an emitting structure formed on the flat plate. The difference from Embodiment 1 and Embodiment 2 is that the emission structure is a circular structure formed by a plurality of through grooves. Wherein, the thickness of the flat plate is 0.05-0.3 mm.

[0045] Please refer to Figure 4(a), the through groove is set from the upper end of the plate to the lower end of the plate, from the left end of the plate to the right end of the plate, and multiple bifurcation points are set on the channel path, each bifurcation point One end forms an arc with the center of the flat plate as the center, and the other end leads to the next bifurcation; finally, a rotationally symmetrical network figure with a rotation angle of 90° is formed. The emission structure adopts four pins, which can make the structure of ...

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Abstract

The invention discloses a flat-plate filament for an X-ray CT tube, belonging to the technical field of medical instruments. The flat filament for an X-ray CT tube includes a flat plate and an emitting structure formed on the flat plate. The emission structure is a four-pin square or circular structure formed by a plurality of through grooves, and the stability of the structure is improved throughthe four-pin structure, and the filament stress deformation caused by the strong centrifugal force generated by the high-speed rotation of the CT machine is avoided. The plate filament prolongs the service life of the filament by optimizing the groove structure and reducing the ignition caused by the pressure difference between the grooves. By reasonably directing the electric current, the influence of the self-generated magnetic field of the flat filament on the electron beam focusing is weakened, and the focal spot quality is ensured.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a flat filament used for an X-ray CT tube. Background technique [0002] In modern medicine, X-ray Computed Tomography Equipment (CT) has become an indispensable equipment in medical imaging diagnosis. As the X-ray source of the CT machine, the X-ray CT tube directly affects the performance and quality of the CT machine, and its importance is self-evident. The principle of X-ray generation by X-ray CT tube is: the cathode filament is heated by current, the electrons overcome the work function and form an electron cloud on the surface; under the action of the strong electric field between the cathode and the anode, the electrons accelerate to fly to the anode and hit the anode. On the target surface, about 1% of the energy is converted into X-rays through bremsstrahlung and characteristic radiation, and about 99% of the energy is converted into heat energy, which is dis...

Claims

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Application Information

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IPC IPC(8): H01J35/06
CPCH01J35/06H01J2235/06
Inventor 王啸方奇叶华伟汪上杰徐伟梁
Owner 麦默真空技术无锡有限公司
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