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Method for Correcting CT Ray Beam Hardening Artifact

A ray beam, ray technology, applied in the field of image processing, can solve problems such as poor robustness and lack of theoretical basis

Active Publication Date: 2020-02-21
SAINUO WEISHENG SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the determination of polynomial coefficients by polynomial fitting comes from experience and lacks theoretical basis. Therefore, the robustness of this method of correcting artifacts is relatively poor

Method used

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  • Method for Correcting CT Ray Beam Hardening Artifact
  • Method for Correcting CT Ray Beam Hardening Artifact
  • Method for Correcting CT Ray Beam Hardening Artifact

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Embodiment Construction

[0030] The structure and features of the present invention will be described in detail below in conjunction with the drawings and embodiments. It should be noted that various modifications can be made to the embodiments disclosed herein, therefore, the embodiments disclosed in the specification should not be regarded as limitations on the present invention, but only as examples of embodiments, and its purpose is to make the present invention The features of the invention are self-evident.

[0031] The method for correcting CT ray beam hardening artifacts in the present invention is to compensate the original image based on X-ray energy spectrum analysis, and eliminate the hardening artifacts of X-ray beams; that is, firstly, according to known scanning conditions, the energy spectrum of X-rays is obtained distribution, calculate the equivalent energy; then scan, reconstruct the original image according to the imaging conditions, divide the original image into soft tissue, bone...

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Abstract

The invention discloses a method for correcting CT ray beam hardening artifact. The method compensates an original image based on X-ray energy spectrum analysis to eliminate hardening artifacts of X-ray beams; that is, according to the known scanning conditions, the energy spectrum distribution of X-rays is obtained and the equivalent energy is calculated. Then, scanning is carried out, the original image is reconstructed according to the image building conditions, the original image is divided into soft tissue, bone tissue and air parts, and energy spectrum projection and equivalent energy projection are carried out on different parts respectively; the difference between the equivalent energy projection and the energy spectrum projection is calculated; the projection difference is backprojected to obtain a compensation image, and the compensation image and the original image are added to obtain a target image corrected by beam hardening artifacts.

Description

technical field [0001] The invention relates to a method for correcting CT ray beam hardening artifacts, belonging to the technical field of image processing. Background technique [0002] CT was invented by British electronic engineer Honsfield G.N. in 1969 and came out in 1972. CT is different from ordinary X-ray imaging. It scans the human body with X-ray beams, obtains information, and reconstructs images obtained by computer processing. It is digital imaging rather than analog imaging. The density resolution of the tomographic anatomical images displayed by CT is significantly better than that of X-ray imaging, which enables the development of anatomical structures and lesions that cannot be displayed by X-ray imaging, thereby significantly expanding the scope of human inspection, improving the detection rate of lesions and diagnostic accuracy. [0003] The basic principle of CT imaging is to use X-ray beams to scan a layer of a certain thickness of the human body ins...

Claims

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Application Information

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IPC IPC(8): A61B6/03A61B6/00
CPCA61B6/032A61B6/5205A61B6/5211A61B6/5258A61B6/583
Inventor 王秀清任彦
Owner SAINUO WEISHENG SCI & TECH BEIJING
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