Low-dose SPECT chordal graph recovery and scatter correction method

A scatter correction, low-dose technology, applied in neural learning methods, 2D image generation, and equipment for radiological diagnosis, etc., can solve problems such as difficult to obtain a large number, poor reconstruction effect, etc.

Pending Publication Date: 2021-12-03
SUN YAT SEN UNIV
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Problems solved by technology

[0005] In order to overcome the problem that the direct reconstruction method in the prior art is difficult to obtain a large amount of training data resulting in poor reconstruction effect, the present invention provides a low-dose SPECT chord diagram restoration and scattering correction method, by preprocessing the low-dose SPECT chord diagram, This can improve the quality of the final image reconstruction

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  • Low-dose SPECT chordal graph recovery and scatter correction method
  • Low-dose SPECT chordal graph recovery and scatter correction method
  • Low-dose SPECT chordal graph recovery and scatter correction method

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Embodiment 1

[0051] like figure 1 Shown is a kind of embodiment of the method for low-dose SPECT chord restoration and scatter correction, comprises the steps:

[0052] Step 1: Generate projection data and perform standardized processing; projection data is generated by using a simulated nuclear medicine imaging detection board program, in which n=1000 projection data are selected as high-dose non-scattering reference data, and n=1 and n =10 data as low-dose band scattering data. Simulating Medical Imaging Nuclear Detectors (SIMIND) is a software based on Monte Carlo numerical simulation, using four phantoms that come with the program: Zubal brain (vox_brn), MDP whole body (mdp_wb), mdpect (mdp_ect) and jaszak, as well as the commonly used pixelated phantom lumpy in SPECT reconstruction algorithm research, generate projection data.

[0053] Assume that the number of rows L of detection units in the simulated nuclear medicine imaging detection board is a fixed value of 128, and the number...

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Abstract

The invention relates to a low-dose SPECT chordal graph recovery and scatter correction method. The method comprises the steps: step 1, generating projection data and performing standardization processing; step 2, inputting the generated projection data into an SCASC-Net model to carry out model training; and step 3, inputting low-dose SPECT chordal graph data into the trained model in the step 2, and carrying out recovery and scattering correction on the chordal graph. For the characteristics of low-dose SPECT projection data and the continuity in the angle direction, the network model disclosed by the invention can discover the relation between projection data angles through the space attention module and the channel attention module while performing low-dose chordal graph recovery and scatter correction, and meanwhile, the relation between the adjacent cross-sectional images in the projection data field can be associated, so that details of the recovered chordal graph can be reserved as much as possible. After the chordal graph is preprocessed through the method, details of the chordal graph can be reserved, image reconstruction is conducted through the preprocessed chordal graph, and finally a high-quality SPECT cross-sectional image can be obtained.

Description

technical field [0001] The present invention relates to the field of image data preprocessing, and more specifically, relates to a method for low-dose SPECT chord recovery and scatter correction. Background technique [0002] SPECT is a non-invasive molecular imaging technology. Doctors need to inject a certain dose of radioactive tracer into the patient's body, and then diagnose suspected diseased organs based on the detected information after the diseased organs are absorbed for about 2-3 hours. Without considering the effects of attenuation, scattering, and blurring, the projection of the radioactive tracer distribution is formed by superimposing the sinusoidal lines corresponding to each point, so we will detect the projection of the object on a row of detection units The data is called a sinogram. Because the radiotracer isotope drugs injected into patients have radiation, the radiation produced by these drugs will induce abnormal metabolism in the human body and even ...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06T11/00G06N3/04G06N3/08A61B6/03
CPCG06T11/005G06T11/008G06N3/084A61B6/5211A61B6/481A61B6/032G06N3/045
Inventor江颖刘曌焕刘伟锋吴锐帆
OwnerSUN YAT SEN UNIV