Carbon nano tube based X-ray tube and CT (computed tomography) scanner

A carbon nanotube and X-ray tube technology, applied in the directions of X-ray tube, X-ray tube electrode, X-ray tube parts, etc., can solve the problem of high cost, prolonged unit sampling time, complex X-ray tube structure and control, etc. problem, to achieve the effect of fast response and long service life

Active Publication Date: 2013-10-16
THE MILITARY GENERAL HOSPITAL OF BEIJING PLA
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Problems solved by technology

If the number of projection angles for one rotation is reduced, the unit sampling time must be extended, and the projections of adjacent voxels on the concentric circle of the imaging object will overlap, resulting in motion artifacts
Although today's high-end CT scanners use flying focus technology to overcome motion artifacts, this leads to a very complex and costly X-ray tube structure and control

Method used

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  • Carbon nano tube based X-ray tube and CT (computed tomography) scanner
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  • Carbon nano tube based X-ray tube and CT (computed tomography) scanner

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the ar...

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Abstract

The invention relates to a carbon nano tube based X-ray tube and a CT (computed tomography) scanner. The carbon nano tube based X-ray tube comprises an anode and a carbon nano tube cathode, wherein electrons generated by field emission of the carbon nano tube cathode under the action of an external electric field bombard the anode so as to generate X-rays. The technical solution provided by the invention can realize high-frequency pulse transmission very easily because a carbon nano tube is adopted to develop the X-ray tube, and is high in response speed and long in service life, thereby overcoming inherent defects of an existing wolfram (W) thermal filament X-ray source, and being capable of better meeting practical application requirements such as medical detection and the like.

Description

technical field [0001] The invention relates to a cold cathode X-ray tube, in particular to an X-ray tube based on carbon nanotubes and a mobile CT scanner. Background technique [0002] The current medical X-ray sources mainly use tungsten (W) hot filament X-ray tubes. The basic principle is: electrify the filament to heat, when the temperature of the filament reaches thousands of degrees Celsius, thermionic electrons are emitted, and the thermal electrons converge under the action of the electric field force and accelerate to hit the anode, thereby generating X-rays. The mode in which thermal emission generates electrons leads to slow start-up and short lifetime of such X-ray sources. The cumulative exposure time of the X-ray tube with rotating anode is generally only tens of hours, and the cumulative exposure time of the X-ray tube with fixed anode is about 2000 hours. [0003] When continuous pulse scanning is required, the traditional X-ray source cannot turn off the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/06
CPCA61B6/032A61B6/405H01J35/065H01J2201/30469
Inventor 徐如祥代秋声高枫张涛
Owner THE MILITARY GENERAL HOSPITAL OF BEIJING PLA
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