Rapid magnetic resonance imaging method and system

A magnetic resonance imaging, fast technology, applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, magnetic variable measurement, etc., can solve the problems of unknown signal sparsity, inability to solve directly, and inapplicable dynamic imaging, etc., to achieve The effects of improving imaging resolution, imaging speed, and imaging quality

Inactive Publication Date: 2012-07-11
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Find the minimum l 0 The norm problem requires an exhaustive enumeration of possible permutations in all sparsities of the nonzero values ​​in the signal and cannot be solved directly
And other methods for obtaining suboptimal solutions, for example, the minimum l 0 Norm method, greedy iterative matching pursuit algorithm, etc., in the minimum l 0 The linear programming method in the norm method can reconstruct the magnetic resonance image, but at the cost of high time, it is not suitable for dynamic imaging, and the greedy iterative matching pursuit algorithm can get the optimal solution quickly, but it is established On the basis of known sparsity, the sparsity of signals in practical applications is often unknown, and it is not suitable for high-resolution dynamic imaging

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
  • Rapid magnetic resonance imaging method and system
  • Rapid magnetic resonance imaging method and system
  • Rapid magnetic resonance imaging method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] In one embodiment, such as figure 1 Shown, a kind of fast magnetic resonance imaging method comprises the following steps:

[0051] Step S10, performing variable density sampling to obtain spatial data.

[0052] In this embodiment, variable density sampling is performed in the K space to obtain a relatively small amount of spatial data and reduce the time spent on sampling.

[0053] In one embodiment, such as figure 2 As shown, the specific process of the above-mentioned step S10 includes:

[0054] Step S110, determine a variable-density random under-sampling trajectory according to the energy distribution.

[0055] In this embodiment, the energy distribution in the K-space is different, that is, dense sampling is performed in the middle part of the K-space, and sparse sampling is performed in the peripheral area, thereby generating random under-sampling trajectories with variable densities.

[0056] Step S130, sampling through random undersampling trajectories wit...

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 invention relates to a rapid magnetic resonance imaging method which comprises the following steps of: carrying out variable-density sampling to obtain space data; carrying out sparse conversion to generate a measurement matrix; and carrying out signal reconstruction on the measurement matrix by a regularization self-adaption matching tracking algorithm. According to the rapid magnetic resonance imaging method and system, less space data is obtained through variable-density sampling, and high-resolution reconstruction of the image is completed under the action of the regularization self-adaption matching tracking algorithm; and due to the combination of the variable density sampling and the regularization self-adaption matching tracking algorithm, the imaging speed is greatly increased, the imaging quality is enhanced, and the imaging resolution in dynamic imaging is improved.

Description

【Technical field】 [0001] The invention relates to magnetic resonance technology, in particular to a fast magnetic resonance imaging method and system. 【Background technique】 [0002] With the development of magnetic resonance technology, magnetic resonance imaging has become an important means of clinical medical examination. It has the advantages of no radiation hazard, multi-directional and multi-parameter imaging, and is very sensitive to the examination of soft tissues. It can not only display the morphological information of human anatomical structures , and can also reflect some physiological information of human tissues. [0003] However, the imaging speed of magnetic resonance imaging is slow, and the physiological movement of the subject's body during the imaging process will blur the image, which cannot meet the dynamic imaging requirements of moving organs. In traditional fast imaging methods, such as compressed sensing imaging methods, a small amount of data col...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/56
Inventor 史彩云谢国喜邱本胜刘新冯翔
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap