Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An image reconstruction method, device and apparatus

An image reconstruction and parameter technology, applied in the field of image processing, can solve the problem of low signal-to-noise ratio of the reconstructed image

Active Publication Date: 2017-02-15
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The signal-to-noise ratio of the reconstructed image obtained by using the existing system matrix for image reconstruction is relatively low. At present, an image reconstruction method based on iterative reconstruction method is needed, which can improve the signal-to-noise ratio of the reconstructed image by improving the coefficient matrix. the goal of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An image reconstruction method, device and apparatus
  • An image reconstruction method, device and apparatus
  • An image reconstruction method, device and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] see Figure 4 , which is a flowchart of an image reconstruction method provided in Embodiment 1 of the present invention.

[0066] The image reconstruction method provided in this embodiment includes the following steps:

[0067] Step S101: Obtain the response line data of photon pairs received by the crystal of the nuclear detector.

[0068] In this embodiment, the photon pair is not composed of any two photons, but is composed of two photons produced by the annihilation of the same nuclide. The response line data includes the actual energy parameter of the photon pair, the actual energy parameter of the photon pair actually received by the crystal of the nuclear detector, the actual energy parameter of the photon pair is within the preset energy range, so The preset energy range is [E m -n%E m ,E m +n%E m ], the preset energy range is the basic requirement for photons to participate in the calculation of the system matrix.

[0069] Step S102: Determine an energ...

Embodiment 2

[0092] see Figure 5 , which is a structural block diagram of an image reconstruction device provided in Embodiment 2 of the present invention.

[0093] The image reconstruction device provided in this embodiment includes: a response line data acquisition module 101, an energy factor determination module 102, a system parameter determination module 103, and a reconstructed image generation module 104;

[0094] Wherein, the response line data acquisition module 101 is used to acquire the response line data received by the crystal of the nuclear detector for the photon pair, the response line data includes the actual energy parameter of the photon pair, the actual energy parameter of the photon pair within the preset energy range;

[0095] The energy factor determining module 102 is configured to determine an energy factor corresponding to the response line according to the actual energy parameter and the theoretical energy parameter of the photon pair, and the energy factor re...

Embodiment 3

[0115] This embodiment provides an image reconstruction device, and the device includes: a processor, a memory for storing instructions executable by the processor, and a display;

[0116] Wherein, the processor is configured as:

[0117] Obtaining the response line data obtained by receiving the photon pair by the crystal of the nuclear detector, the response line data including the actual energy parameter of the photon pair, and the actual energy parameter of the photon pair is within a preset energy range;

[0118] determining an energy factor corresponding to the response line according to the actual energy parameter and the theoretical energy parameter of the photon pair, the energy factor reflecting the degree to which the actual energy parameter is close to the theoretical energy parameter;

[0119] The system parameters are obtained according to the energy factor, and the system response model is constructed by using the system parameters, and the reconstructed image is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiments of the invention provide an image reconstruction method, device and apparatus, which can achieve the objectives of reducing noise of reconstructed images and increasing the signal to noise ratio of reconstructed images. The method comprises the steps of acquiring response line data obtained when photon pairs are received by a crystal of a nuclear detector, wherein the response line data include the practical energy parameters of the photon pairs, which are in a preset energy range; determining energy factors corresponding to the response line according to the practical energy parameters and theoretical energy parameters of the photon pairs, wherein the energy factors represent the closeness degree of the practical energy parameters with respect to the theoretical energy parameters; acquiring system parameters according to the energy factors, establishing a system response model by using the system parameters, and obtaining a reconstructed image by using the system response model, wherein elements of the system parameters represent the probabilities of photon pairs generated by human body parts corresponding to the voxels of the image being received by the nuclear detector.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an image reconstruction method, device and equipment. Background technique [0002] PET (Positron Emission Computed Tomography, Positron Emission Computed Tomography) and PET-CT (Computed Tomography, Computed Tomography) are the most advanced large-scale medical diagnostic imaging equipment today. [0003] PET and PET-CT reconstruct the image of the nuclide distribution by detecting the photon pairs generated when the positrons emitted by the nuclide in the living body or phantom tissue are annihilated. The specific reconstruction process is: inject a certain amount of Drugs of radioactive elements, radionuclides undergo radioactive decay to produce positrons, which annihilate after moving for a small distance, producing a pair of photon pairs (such as gamma photon pairs) whose motion directions differ by nearly 180 degrees. The two photons of the photon pair hit two diff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61B6/00
CPCA61B6/52G06T11/006G06T2211/424G01T1/2985G06T11/003G06T2210/41
Inventor 孙智鹏刘勺连李明
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com