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Magnetic resonance imaging method and device

A technology of magnetic resonance imaging and magnetic resonance image, which is applied in magnetic resonance measurement, measurement using nuclear magnetic resonance imaging system, measurement of magnetic variables, etc. Information and other issues to achieve the effect of improving accuracy and accelerating imaging

Active Publication Date: 2017-07-21
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The adaptive type can obtain more structural information but the calculation is complicated, while the non-adaptive type is good for calculation, but it is easy to lose information
These methods only obtain prior information from the image to be reconstructed, or only use a small amount of related images, and cannot explore and utilize prior information in a large amount of data, resulting in slower MRI speed and lower imaging accuracy.

Method used

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  • Magnetic resonance imaging method and device
  • Magnetic resonance imaging method and device

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Embodiment 1

[0023] figure 1 The implementation flow of the magnetic resonance imaging method provided by Embodiment 1 of the present invention is shown, and the implementation flow is described in detail as follows:

[0024] Step S101, acquiring a fully sampled offline multi-contrast image of a sample object.

[0025] In the embodiment of the present invention, the sample object may be an object selected by the user as a sample. The acquisition of the fully-sampled offline multi-contrast image of the sample object is to obtain a large number of fully-sampled offline multi-contrast images of a certain area on the sample object, and it is required that the fully-sampled offline multi-contrast image The resolution is the same, for example, a full-scale offline multi-contrast image of a certain organ on Xiao Zhang's head is acquired at the same resolution.

[0026] Taking humans as an example, because the same organ or tissue of different people has similar anatomical characteristics, such ...

Embodiment 2

[0051] figure 2 A schematic diagram of the composition of the magnetic resonance imaging apparatus provided by Embodiment 2 of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0052] The off-line multi-contrast image acquisition module 21 is used to obtain the fully-collected off-line multi-contrast image of the sample object;

[0053] The under-sampling module 22 is used to under-sample each of the full-sampled offline multi-contrast images in the K space, so as to obtain the under-sampled multi-contrast images;

[0054] The training module 23 is used to train a deep learning network according to the under-collected multi-contrast images and the fully-collected offline multi-contrast images;

[0055] An under-acquisition image acquisition module 24, configured to acquire an under-acquisition image of the object to be measured;

[0056] The onlin...

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Abstract

The invention belongs to the technical field of magnetic resonance reconstruction and provides a magnetic resonance imaging method and a device. The method comprises steps of acquiring completely acquired offline multi-contrast images of a sample object; carrying out insufficient acquisition on each completely acquired image in the completely acquired offline multi-contrast images in K space so as to acquire insufficiently acquired multi-contrast images; according to the insufficiently acquired multi-contrast images and the completely acquired offline multi-contrast images, training a depth learning network; acquiring the insufficiently acquired images of a to-be-measured object; and inputting the insufficiently acquired images of the to-be-measured object into the trained depth learning network so as to acquire an online magnetic resonance image of the to-be-measured object. According to the invention, under the condition that the original contrast is kept, the lost information in the insufficient acquisition of the magnetic resonance image is recovered, so imaging is accelerated and magnetic resonance imaging precision is improved.

Description

technical field [0001] The invention belongs to the technical field of magnetic resonance reconstruction, and in particular relates to a magnetic resonance imaging method and device. Background technique [0002] At present, methods based on signal processing and using prior information for MRI image reconstruction can be simply divided into two categories: adaptive and non-adaptive. For example, dictionary learning and data-driven compact frameworks are adaptive, while global transforms and wavelet transforms are non-adaptive. The adaptive type can obtain more structural information but the calculation is complicated, while the non-adaptive type is good for calculation, but it is easy to lose information. These methods only obtain prior information from the image to be reconstructed, or only use a small number of related images, and cannot explore and utilize prior information in a large amount of data, resulting in slower MRI speed and lower imaging accuracy. [0003] Th...

Claims

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Application Information

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IPC IPC(8): G01R33/48
CPCG01R33/48
Inventor 梁栋王珊珊赵涛刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH
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