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Dynamic PET (positron emission tomography) image reconstruction method based on Poisson TV

An image reconstruction and dynamic technology, applied in the field of PET imaging, which can solve the problems of noise interference and low resolution of results.

Active Publication Date: 2015-05-27
ZHEJIANG UNIV
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Problems solved by technology

[0005] The invention provides a dynamic PET image reconstruction method based on Poisson TV, which can solve the problems of low resolution and noise interference in the process of computer image reconstruction

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  • Dynamic PET (positron emission tomography) image reconstruction method based on Poisson TV
  • Dynamic PET (positron emission tomography) image reconstruction method based on Poisson TV
  • Dynamic PET (positron emission tomography) image reconstruction method based on Poisson TV

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Embodiment Construction

[0052] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] Such as figure 1 Shown, the present invention is based on the dynamic PET image reconstruction method of PoissonTV, comprises the steps:

[0054] The positron emission tomography scanner detects the radioactive signals emitted from the human body, and after processing by the coincidence and acquisition system, the original projection line is formed and stored in the computer hard disk in the form of a sinogram; for the originally collected sinogram, the sinogram and known The system matrix G of is the input item, and the relevant modules are called.

[0055] S1. Establish the basic model of the reconstruction problem according to the principle of PET detection;

[0056] S2. Introduce Poisson and Low-Rank to optimize the problem model;

[0057] S...

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Abstract

The invention discloses a dynamic PET (positron emission tomography) image reconstruction method based on a Poisson TV. According to the method, PET images are reconstructed through conversion of a reconstruction problem mathematical model and an equivalence problem on the basis of a Low Rank method, and an alternate minimization algorithm is adopted during solution of the equivalence model problem when the PET images are reconstructed in combination with Poisson and Low Rank models. Therefore, the Low-Rank algorithm is utilized effectively, and problems of low resolution and noise interference of results produced during dynamic PET image reconstruction by a computer are solved; compared with existing reconstruction method through tests, the method can realize the better reconstruction effect.

Description

technical field [0001] The invention belongs to the technical field of PET imaging, in particular to a dynamic PET image reconstruction method based on Poisson TV (total variation of Poisson distribution). Background technique [0002] Positron emission tomography (PET) is a medical imaging technology based on nuclear physics and molecular biology. in accordance with. When performing PET scanning, it is first necessary to inject drugs labeled with radioactive isotopes into the human body. Through the blood circulation system, these substances will form a certain distribution in various tissues and organs in the human body. Because the radioactive isotope is unstable, it will decay, and the positrons generated during the decay will annihilate with the electrons in the tissue, producing a pair of gamma photons with almost opposite directions. Pairs of photons that distribute information are processed to generate projection data. The spatial concentration distribution of rad...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 刘华锋王陈也
Owner ZHEJIANG UNIV
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