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X-ray tube using piezoelectric ceramics to compensate anode movement and its compensation method

A technology of piezoelectric ceramics and X-ray tubes, applied in the field of X-ray tubes, can solve problems affecting image imaging, inconsistency, image blurring and actual structure, etc., and achieve the effect of solving focus drift, stable image quality, and stable X-ray output

Active Publication Date: 2017-01-18
SAINUO WEISHENG SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the relative position of the X-ray receiving device and the X-ray tube shell is fixed, after the focus drifts, the data received by the detector will be different from the data before the drift. The image quality is badly affected, blurring the image or producing stripes inconsistent with the actual structure

Method used

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  • X-ray tube using piezoelectric ceramics to compensate anode movement and its compensation method
  • X-ray tube using piezoelectric ceramics to compensate anode movement and its compensation method
  • X-ray tube using piezoelectric ceramics to compensate anode movement and its compensation method

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] The present invention discloses an X-ray tube that uses piezoelectric ceramics to compensate for the movement of the anode, which uses piezoelectric ceramics to make the rotating shaft support of the anode target, and implements negative feedback through the voltage applied to the piezoelectric material to control focus drift Amount, so as to effectively solve the focus drift problem caused by thermal expansion of the anode.

[0027] figure 2 A schematic s...

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Abstract

The invention relates to an X-ray tube using piezoelectric ceramic for positive electrode movement compensation. The X-ray tube using piezoelectric ceramic for positive electrode movement compensation is composed of a negative electrode, a positive electrode, an X-ray tube housing, a stator coil and the like. The positive electrode comprises a positive electrode rotor, a shaft holder, a shaft holder sleeve, a rotary bearing and a piezoelectric ceramic driver. The invention also relates to a compensation method of using piezoelectric ceramic for positive electrode movement compensation. According to the X-ray tube and the positive electrode movement compensation method, negative feedback is achieved through the voltage applied to a piezoelectric ceramic material to control the positive electrode focus drift distance, so that the problem of focus drift caused by thermal expansion of the positive electrode is effectively solved.

Description

technical field [0001] The invention relates to an X-ray tube structure on a CT machine and a method for controlling the focus drift of the X-ray tube on the CT machine, in particular to an X-ray tube that uses piezoelectric ceramics to compensate for anode movement in a CT machine and a method for controlling the focus drift of the anode. Background technique [0002] The principle of X-ray imaging is to use X-rays to penetrate the human body, and obtain the internal structure information of the human body through the different degrees of attenuation of X-rays by various tissues and organs of the human body. Ordinary X-ray films only use X-ray attenuation data at a specific angle to obtain a two-dimensional projection image of the three-dimensional structure of the human body in this direction. The CT machine uses attenuation data from multiple angles at the same time to completely reconstruct the three-dimensional structure of the human body. As the light source of X-rays...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J35/02
CPCH01J35/025H01J35/101
Inventor 任彦
Owner SAINUO WEISHENG SCI & TECH BEIJING
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