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X-ray CT image enhancement method based on double energy spectrums

A CT image and X-ray technology, applied in the field of X-ray CT image enhancement based on dual energy spectrum, to achieve the effect of making up for defects

Inactive Publication Date: 2014-11-19
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is mostly limited to the enhancement of CT images under a single energy

Method used

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  • X-ray CT image enhancement method based on double energy spectrums
  • X-ray CT image enhancement method based on double energy spectrums
  • X-ray CT image enhancement method based on double energy spectrums

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Embodiment Construction

[0036] The purpose of the present invention is to provide an X-ray CT image enhancement method based on dual energy spectrum. The method includes the following steps:

[0037] Scanning to obtain multiple sets of dark field images, and calculating the average value of the dark field;

[0038] Place the scanning object on the inspection table, set the scanning conditions and the maximum number of scanning angles;

[0039] At the same location, collect a set of fluoroscopy images under different voltage parameters, namely, high and low voltages;

[0040] Rotate the turntable to a preset angle and continue to repeat the previous step until the number of times reaches the maximum number of scans;

[0041] Move the sample out of the field of view, obtain N groups of bright-field images at high and low voltages, and calculate the average of the bright-fields at the high and low voltages;

[0042] Mark invalid pixels for bright field data under high and low voltage;

[0043] Mark the invalid pix...

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Abstract

The invention relates to the technical field of CT and provides an X-ray CT image enhancement method based on double energy spectrums. In order to realize image fusion and enhancement of two images and compensate defects of a single image, the invention adopts the technical scheme as follows: the X-ray CT image enhancement method based on double energy spectrums comprises the following steps: scanning to obtain multiple sets of dark field images and calculating the average value of dark fields; moving a sample out of a view field, and respectively obtaining N sets of bright field images under high voltage and low voltage; calculating projected images under the high voltage and low voltage; unifying projection data under the high voltage and low voltage to a dimension according the gray level unifying principle; performing wavelet decomposition on N sets of corrected high and low energy projected images at the same position, and performing image fusion through the wavelet transform method; performing CT reconstruction through the utilization of fused projected images. The X-ray CT image enhancement method is mainly used for CT equipment design and manufacturing.

Description

Technical field [0001] The invention relates to the field of CT technology, in particular to an X-ray CT image enhancement method based on dual energy spectrum. . technical background [0002] Due to the complexity of X-ray CT detection objects and the influence of various factors such as ray energy, scattering, noise, etc. during the imaging process, the image quality varies and there will be varying degrees of degradation. Especially when the scale difference in different directions in the scanned object is too large or the absorption intensity of the substance is too large, the quality of CT imaging is severely degraded. Usually, only part of the image can be reconstructed, and part of the image is hidden in the background and cannot be recognized. , That is, the reconstructed CT image under a single energy spectrum has image degradation and loss of details. [0003] Enhancement of CT images is a hot area of ​​CT imaging research. But it is mostly limited to the enhancement o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00A61B6/03
Inventor 邹晶胡晓东须颖陈津平胡小唐
Owner TIANJIN UNIV
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