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Image reconstruction method and application

An image reconstruction and image technology, applied in the direction of image generation, image data processing, 2D image generation, etc., can solve problems such as excessive noise and fringe artifacts, diagnosis and quantitative errors, and achieve good structural information, suppress noise, The effect of reducing radiation dose

Pending Publication Date: 2021-03-12
SHENZHEN INST OF ADVANCED TECH
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Problems solved by technology

[0006] Based on the traditional filtered back projection reconstruction image, this method may lead to excessive noise and stripe artifacts, which further lead to the problem of diagnosis and quantitative errors, this application provides an image reconstruction method and its application

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  • Image reconstruction method and application
  • Image reconstruction method and application

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Embodiment Construction

[0031] Firstly, this study simulated low-dose CT images with different views (ray intensity I0=1*10^5). Compute the noise-free line integral y in a model-based direct projection operation for simulation studies of low-mas projection data i After that, a noise measure at each i is generated according to a statistical model of the pre-log-projected data

[0032]

[0033] In the formula, I0 is the incident X-ray intensity, y i is the sinogram data, is the variance of background electronic noise, set to 0.1. with b i Compute the logarithmic transformation of the noise measurement y i . When used for simulation of projected data, the original 360 views are undersampled to 4 levels, namely: 60, 90, 120 and 180 views.

[0034] Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. According to these detailed descriptions, those skilled in the art can clearly understand the present application and...

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Abstract

The invention belongs to the technical field of computed tomography, and particularly relates to an image reconstruction method and application. In a traditional filtered back projection reconstructedimage, the method may cause excessive noise and stripe artifacts, thereby further causing diagnosis and quantification errors. The invention provides an image reconstruction method. The method comprises the following steps: 1, reconstructing corrected projection data; obtaining reconstruction data; 2, regularizing the reconstruction data to obtain a regularized image; 3, reconstructing the regularized image to obtain a reconstructed image; 4, taking the reconstructed image as prior information, and performing guided kernel filtering under the guidance of the reconstructed image to obtain a restored image. The reconstructed image has good structural information.

Description

technical field [0001] The present application belongs to the technical field of computed tomography, and in particular relates to an image reconstruction method and its application. Background technique [0002] Computer X-ray tomography (X-CT or CT for short) is to use X-rays to scan the human body, and the analog signal r received by the detector is then converted into a digital signal, and the attenuation of each pixel is calculated by the computer. Coefficients, and then reconstruct the image, and can show the device of the fault structure of each part of the human body. Image fusion (Image Fusion) refers to the image data collected by multiple source channels about the same target through image processing and computer technology, etc., to maximize the extraction of beneficial information in each channel, and finally synthesize high-quality images to Improve the utilization of image information, improve the accuracy and reliability of computer interpretation, improve t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
CPCG06T11/006G06T11/008G06T2210/41
Inventor 郑海荣梁栋胡战利刘新黄英
Owner SHENZHEN INST OF ADVANCED TECH
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