Energy spectrum CT reconstruction method and device based on tensor nuclear norm and transformation Lp norm
A technology of nuclear norm and energy spectrum, applied in the field of energy spectrum CT reconstruction based on tensor nuclear norm and transformed Lp norm, can solve problems such as ignoring high correlation, image texture and edge degradation
Pending Publication Date: 2022-01-11
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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However, they ignore the high correlation between different channel images of spectral CT, which leads to the degradation of image texture and edge
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[0048] 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 making creative efforts belong to the protection scope of the present invention.
[0049] Such as figure 1 As shown, the energy spectrum CT reconstruction method based on the tensor nuclear norm and the transformation Lp norm of the present embodiment includes the following steps:
[0050] Step S11, selecting a frameset transformation matrix and initializing an image.
[0051] Specifically, the frame set transformation matrix W and the decomposition level l are selected, and the initial image is a matrix of all 0s or all 1s; the frame set t...
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The invention belongs to the technical field of energy spectrum CT reconstruction, and particularly relates to an energy spectrum CT reconstruction method and device based on a tensor nuclear norm and a transformation Lp norm, and the method comprises the steps: selecting a frame set transformation matrix and initializing an image; establishing relevance in and between channels of the energy spectrum CT image by using a block matching technology, and constructing a non-local similar tensor; fusing the non-local similar tensor into the reconstruction model, and updating the reconstruction model; performing energy spectrum CT reconstruction based on a frame set tensor nuclear norm and a transformation Lp norm; and judging whether the quality of the reconstructed image meets the requirement. According to the method, the correlation of images between channels is explored by using a frame set tensor nuclear norm, a target function is improved by using a constructed non-local similar tensor, a new reconstruction model is established, and the convergence efficiency and the quality of reconstructed images are improved through a continuous iteration and circulation mechanism.
Description
technical field [0001] The invention belongs to the technical field of energy spectrum CT reconstruction, in particular to an energy spectrum CT reconstruction method and device based on a tensor kernel norm and a transformed Lp norm. Background technique [0002] As a modern imaging technology, computed tomography (Computed Tomography, CT) has been widely used in medicine, industry and other fields. However, traditional CT technology uses X-rays at a single energy for imaging, and has limited ability to distinguish material components. In order to break through the imaging limitations of traditional CT technology, spectral CT (Spectral CT) uses the difference in attenuation coefficients of materials under different X-ray energies to obtain richer material information, and has the ability to identify and analyze materials that traditional CT technology does not have. A new type of imaging technology is being researched and used step by step. [0003] The key step in spectr...
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Login to View More IPC IPC(8): G06T11/00G06K9/62G06V10/74
CPCG06T11/005G06F18/22
Inventor 闫镔于小缓蔡爱龙李磊梁宁宁王林元王毅忠仲心怡郑治中孙艳敏
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU