Method and system for reconstructing magnetic resonance parameters

A magnetic resonance and parameter technology, applied in image data processing, instrumentation, calculation, etc., can solve problems such as error transmission, multiple artifacts and errors in DTI images, and achieve the effects of reducing artifacts, improving quality, and improving reconstruction quality

Active Publication Date: 2012-09-12
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

However, reconstructing the DWI image from the downsampling data, and then using the DWI image to calculate the D value will cause error transmission, and the error introduced during the reconstruction will lead to errors in fitting the D value, which will cause more artifacts in the DTI image

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  • Method and system for reconstructing magnetic resonance parameters
  • Method and system for reconstructing magnetic resonance parameters
  • Method and system for reconstructing magnetic resonance parameters

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Embodiment Construction

[0046] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0047] see figure 1 , the magnetic resonance parameter reconstruction method 100 of the present embodiment includes the following steps:

[0048] Step 110, acquire the K-space data of the diffusion weighted imaging according to the random downsampling matrix. It can be understood that the images of the diffusion weighted imaging are collected by a magnetic resonance instrument.

[0049] Step 120, establishing a mathematical model of the image of the diffusi...

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Abstract

A method for reconstructing magnetic resonance parameters includes the steps: acquiring diffusion-weighted imaging K space data according to a random descending acquisition matrix; establishing a diffusion-weighted imaging mathematical model containing a dispersion tensor coefficient; defining an objective function, fitting the dispersion tensor coefficient by solving an optimization problem and adding sparse constraint; and solving the dispersion tensor coefficient according to the descending acquired data to minimize the objective function. In the method for reconstructing the magnetic resonance parameters, DWI (diffusion-weighted imaging) images do not need to be reconstructed, the dispersion tensor coefficient is directly obtained from the descending acquired K space data by means of calculation, mistaken fitting of the dispersion tensor coefficient caused by errors introduced in reconstruction of the DWI images is avoided, and error propagation is prevented. The invention further provides a system for reconstructing the magnetic resonance parameters.

Description

【Technical field】 [0001] The invention relates to magnetic resonance imaging technology, in particular to a method and system for reconstructing magnetic resonance parameters. 【Background technique】 [0002] Diffusion Tensor Imaging (DTI) is a new imaging method developed on the basis of Diffusion Weighted Imaging (DWI). It uses the diffusion anisotropy of water molecules for imaging, and can nondestructively evaluate the The integrity of the organizational structure provides more information for the prevention, diagnosis and treatment of diseases. However, DTI requires longer scan times and has a lower signal-to-noise ratio than other MRI techniques. In order to reduce the impact of noise, the method of averaging multiple scans is usually used in DWI, which will result in a multiplied increase in scan time, which seriously restricts its application in medical treatment. Therefore, fast DTI imaging has important research significance. [0003] Generally speaking, the size...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 梁栋朱燕杰吴垠刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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