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X-ray source array and X-ray computed tomography system and method

A tomography and X-ray technology, applied in the field of X-ray scanning imaging, can solve the problems of different magnification, large distance difference, unfavorable system integration, etc., and achieve the effect of improving quality and reducing volume

Active Publication Date: 2019-02-19
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the distances from the X-ray sources at different positions to the surface of the scanned object are quite different, and the magnifications of the projected images received by the detectors from different angles are different, which makes the quality of the reconstructed image poor; The mechanical vibration and damaged X-ray source cannot be replaced separately, which is not conducive to the integration of the system

Method used

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  • X-ray source array and X-ray computed tomography system and method
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  • X-ray source array and X-ray computed tomography system and method

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Embodiment 1

[0029] The technical solution of this embodiment is applicable to the field of X-ray tomographic imaging. The X-ray source array of the embodiment of the present invention may include a plurality of individually packaged cold cathode X-ray source bulbs; wherein each cold cathode X-ray source bulb The arrangement track of the tubes is arc-shaped.

[0030] Among them, the cold cathode X-ray source tube adopts the cold cathode field emission X-ray source, which generates electron beams by means of field electron emission. The field emission cathode has low operating temperature, low power consumption, and is easy to integrate. At the same time, since there is no time delay in the field electron emission, the field emission X-ray source using a cold cathode can achieve high time resolution and programmable X-ray emission. It can be understood that the X-ray source array may include multiple cold-cathode X-ray source tubes. Optionally, the number of cold-cathode X-ray source tubes ...

Embodiment 2

[0041] The technical solution of this embodiment can be applied to the field of X-ray tomography imaging, and the X-ray tomography system provided by this embodiment includes a detector and any X-ray source array of the above-mentioned embodiments; wherein, the arrangement of the X-ray source array The center of the circle where the trajectory is located is on the detector. The principle and specific implementation of the X-ray source array are as described in the above embodiments.

[0042] Among them, the detector is a device that converts X-ray energy into electrical signals that can be recorded. The detector is located below the X-ray source array. After receiving the X-rays passing through the scanned object placed above the detector, it generates electrical signals proportional to the radiation intensity of the X-rays to obtain projection images from different angles.

[0043] According to the technical solution of the embodiment of the present invention, the center of ...

Embodiment 3

[0050] This embodiment is applicable to the case of X-ray static tomography, especially suitable for the case where the tube currents of each cold-cathode X-ray source tube are different and the pulse exposure time is short. The method can be executed by the X-ray tomographic scanning system provided in the second embodiment of the present invention, and the system can be realized by software and / or hardware. The method of the embodiment of the present invention specifically includes the following steps:

[0051] Separately calibrate the operating voltage of each cold cathode X-ray source tube in the X-ray source array, so that the tube current of each cold cathode X-ray source tube is consistent; the X-ray source array includes a plurality of individually packaged cold cathode X-ray sources The tube; scan the target object according to the operating voltage of each cold cathode X-ray source tube and the preset point-by-point pulse exposure method; control the control platform...

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Abstract

An embodiment of the invention discloses an X-ray source array and an X-ray computed tomography system and method. The X-ray source array comprises a plurality of individually packaged cold cathode X-ray source bulb tubes, and the arrangement track of each cold cathode X-ray source bulb tube is arc-shaped. The X-ray computed tomography system comprises the X-ray source array and a detector, and the center of a circle of the arrangement track of the X-ray source array is positioned on the detector, so that the distances from the cold cathode X-ray source bulb tubes at different arrangement positions in the X-ray source array to the surface of the detector are the same. Besides, according to the X-ray computed tomography method, the tube current of the cold cathode X-ray source bulb tube isconsistent, and the dosage of different-angle X-ray sources to a target object tends to be consistent.

Description

technical field [0001] Embodiments of the present invention relate to the field of X-ray scanning imaging, and in particular to an X-ray source array, an X-ray tomography system and method. Background technique [0002] The cold cathode X-ray source has the characteristics of low power consumption, easy integration, and high time resolution. Multiple cold cathode X-ray sources integrated in the X-ray source array can generate X-ray focal spots at different positions. The way of point pulse exposure realizes the movement of the focal point, so that the projection images of different angles can be obtained without moving the X-ray source, and static tomographic imaging can be realized. [0003] The existing X-ray source array adopts an overall packaging method, and each cold-cathode X-ray source is placed linearly in a special vacuum chamber, and an external vacuum pump is required to maintain the vacuum environment in the chamber. However, the distances from the X-ray source...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/4007A61B6/44A61B6/502A61B6/542
Inventor 石伟梁栋洪序达胡战利葛永帅蒋昌辉张其阳郑海荣
Owner SHENZHEN INST OF ADVANCED TECH
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