Magnetic resonance spectrum reconstruction method based on block Hankel matrix

A magnetic resonance and matrix technology, which is applied in the field of reconstructing two-dimensional or three-dimensional magnetic resonance spectroscopy with block Hankel matrix properties, can solve the problems of unfavorable application and promotion of magnetic resonance spectroscopy, long time consumption, and accelerated sampling time.

Inactive Publication Date: 2016-07-27
XIAMEN UNIV OF TECH
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Problems solved by technology

However, the process of obtaining complete two-dimensional or three-dimensional spectral data takes a long time, which is not conducive to the application and promotion of magnetic resonance spectroscopy. Therefore, it is particularly important to undersample the indirect dimension of magnetic resonance spectral data to speed up the sampling time.

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  • Magnetic resonance spectrum reconstruction method based on block Hankel matrix
  • Magnetic resonance spectrum reconstruction method based on block Hankel matrix
  • Magnetic resonance spectrum reconstruction method based on block Hankel matrix

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Embodiment Construction

[0043] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] Such as Figure 7 As shown, the present invention provides a kind of magnetic resonance spectrum reconstruction method based on block Hankel matrix, comprises the steps:

[0045] (1) Obtain the undersampling template of the magnetic resonance signal

[0046] In the magnetic resonance experiment, the undersampling method and experimental parameters of the experiment are set according to the data requirements. At this time, the dimensional position of the sampled signal point can be determined, and then the undersampling template of the experiment can be obtained. combine figure 1As shown, it is a schematic diagram of the signal sampling position, where the hollow white dot indicates that the data corresponding to the position is sampled, and the solid black dot indicates that the data corresponding to the posi...

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Abstract

The invention discloses a magnetic resonance spectrum reconstruction method based on a block Hankel matrix. The method comprises the following steps: firstly acquiring a magnetic resonance signal under-sampling template, constructing a block Hankel matrix of a two-dimensional matrix, and establishing a low-rank reconstruction model based on the block Hankel matrix of a magnetic resonance free attenuation signal; and then solving the reconstruction model through an iteration algorithm and acquiring a reconstructed free attenuation signal; and finally performing the Fourier transform to obtain a complete magnetic resonance spectrum. The reconstruction method disclosed by the invention is small in required sampling data amount, high in precision, and capable of reconstructing a complete magnetic resonance spectrum from less under-sampling data; the sampling speed of the method provided by the invention is faster than that of the existing method under the condition of obtaining the reconstructed spectrum data with the same quality.

Description

technical field [0001] The invention relates to a two-dimensional or three-dimensional magnetic resonance spectrum reconstruction method, in particular to a method for accelerating the imaging speed of the magnetic resonance spectrum by using an under-sampling technique and reconstructing a two-dimensional or three-dimensional magnetic resonance spectrum by using the property of a block Hankel matrix. Background technique [0002] In 1953, the world's first commercial NMR spectrometer appeared. In 1956, Varian, who worked in the Block laboratory, manufactured the first high-resolution instrument. Since then, nuclear magnetic resonance spectroscopy has become a powerful tool for chemists to study compounds, and its application field has gradually expanded. Since the 1970s, due to the development of science and technology, the precision and automation of scientific instruments, nuclear magnetic resonance spectroscopy has developed rapidly and has been widely used in many field...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/16
CPCG06F17/16G06F30/367
Inventor 郭迪屈小波
Owner XIAMEN UNIV OF TECH
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