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Interventional Magnetic Resonance Imaging Method, System and Medium Based on Low Rank and Sparse Decomposition

A technology of sparse decomposition and imaging method, which is applied in the direction of using nuclear magnetic resonance image system for measurement, magnetic resonance measurement, and measurement of magnetic variables. It can solve the problems of difficult real-time imaging navigation, real-time imaging and interventional navigation, and avoid motion Artifacts, good reconstruction image quality, good real-time effect

Active Publication Date: 2022-02-25
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

However, due to the limitation of imaging time, conventional MRI methods are difficult to achieve real-time imaging and interventional navigation
Although the current magnetic resonance dynamic imaging for heartbeat and respiratory motion can achieve good temporal and spatial resolution, it needs to carry out image reconstruction after all acquisition processes are completed, which is difficult to apply to real-time imaging navigation

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  • Interventional Magnetic Resonance Imaging Method, System and Medium Based on Low Rank and Sparse Decomposition
  • Interventional Magnetic Resonance Imaging Method, System and Medium Based on Low Rank and Sparse Decomposition
  • Interventional Magnetic Resonance Imaging Method, System and Medium Based on Low Rank and Sparse Decomposition

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Embodiment

[0068] A magnetic resonance interventional imaging method based on low-rank and sparse decomposition provided by the present invention comprises the following steps:

[0069] Step 1: During the intervention, the k-space data is collected continuously using the golden angle radial sampling method;

[0070] In order to achieve fast MRI interventional imaging, the golden angle radial sampling method is adopted to continuously collect k-space data during the intervention process, that is, the sampling radial spoke interval angle is the "golden angle", such as figure 1 (a) shown.

[0071] Step 2: Group the collected spatial data;

[0072] In dynamic magnetic resonance imaging, in the prior art, all k-space data are usually collected retrospectively and reconstructed, and each frame of image needs to be reconstructed with a certain number of radial spokes, such as figure 1 (b) shown. This kind of retrospective reconstruction is not suitable for MRI interventional imaging that req...

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Abstract

The present invention provides a magnetic resonance interventional imaging method, system, and medium based on low-rank and sparse decomposition, including: step 1: during the intervention process, continuously collect k-space data by using the golden angle radial sampling method; step 2: The collected k-space data are grouped; Step 3: The method based on low-rank and sparse decomposition and framelet transformation is used to reconstruct the magnetic resonance interventional image. The present invention is based on grouping k-space collection and reconstruction, can carry out reconstruction under the condition of less data collection, has high time resolution and good real-time performance.

Description

technical field [0001] The present invention relates to the technical field of magnetic resonance interventional imaging, in particular, to a method, system and medium of magnetic resonance interventional imaging based on low-rank and sparse decomposition; in particular, to a method for k-space using golden angle radial sampling, based on An Interventional Magnetic Resonance Imaging Method for Image Reconstruction with Low-Rank and Sparse Decomposition. Background technique [0002] Interventional MRI (i-MRI) is an important method for magnetic resonance image-guided therapy. Magnetic resonance images provide better soft tissue contrast than other imaging modalities such as CT and ultrasound. This could greatly improve the outcomes of procedures such as biopsies and deep brain stimulation (DBS). However, due to the limitation of imaging time, conventional MRI methods are difficult to achieve real-time imaging and interventional navigation. Although the current magnetic re...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/48
CPCG01R33/4818
Inventor 冯原何钊朱亚南邱苏豪张小群
Owner SHANGHAI JIAOTONG UNIV
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