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Rapid myocardial perfusion magnetic resonance imaging method based on low-rank tensor coding

A technology of magnetic resonance imaging and myocardial perfusion, which is applied in the field of medical imaging and can solve the problems of speeding up myocardial perfusion magnetic resonance imaging and the like

Inactive Publication Date: 2021-05-28
NANCHANG UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to make full use of the space-time redundancy of myocardial perfusion sequence images to accelerate the speed of myocardial perfusion magnetic resonance imaging through the low-rank tensor coding method

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  • Rapid myocardial perfusion magnetic resonance imaging method based on low-rank tensor coding
  • Rapid myocardial perfusion magnetic resonance imaging method based on low-rank tensor coding
  • Rapid myocardial perfusion magnetic resonance imaging method based on low-rank tensor coding

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[0033] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples of implementation. The specific embodiments described here are only used to explain the technical solution of the present invention, and are not limited to the present invention.

[0034] Reference attached figure 1 A fast myocardial perfusion magnetic resonance imaging method based on low-rank tensor coding of the present invention is described.

[0035] Step S101: Using a non-local strategy to perform three-dimensional similar block clustering on myocardial perfusion sequence images to form a high-order low-rank tensor. Extract three-dimensional image blocks from myocardial perfusion sequence images, for each three-dimensional sample block (i is the index of the sample block, and the size of the block is ), using the non-local similarity of my...

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Abstract

The invention relates to the field of magnetic resonance imaging, and discloses a rapid myocardial perfusion magnetic resonance imaging method based on low-rank tensor coding, which comprises the following steps of: (a) searching three-dimensional similar blocks in a myocardial perfusion image frame according to a certain similarity criterion by adopting a k-nearest neighbor method, and clustering to construct a three-dimensional low-rank tensor; (b) performing high-order singular value decomposition on the constructed three-dimensional low-rank tensor to utilize space-time redundancy of the myocardial perfusion sequence image; (c) introducing an augmented Lagrange technology, and establishing an image reconstruction model based on low-rank tensor coding; and (d) solving the reconstruction model by using an alternating direction multiplier method to obtain an imaging result. The space-time redundancy of the myocardial perfusion magnetic resonance image is mined through low-rank tensor coding, so that the image data can be better sparsely represented, and a satisfactory image reconstruction effect is obtained under over-sampling and under-sampling, so that the speed of myocardial perfusion magnetic resonance imaging is increased.

Description

technical field [0001] The invention relates to the field of medical imaging, in particular to an image reconstruction method for accelerating myocardial perfusion magnetic resonance imaging by using low-rank tensor coding and utilizing space-time redundant information. Background technique [0002] Myocardial perfusion magnetic resonance imaging is a non-invasive, ionizing radiation-free method for measuring myocardial blood flow. Angiography can only reflect the lack of anatomical stenosis of coronary vessels above the millimeter level, and more accurately reflect the pathophysiological and hemodynamic status of cardiomyocytes. Magnetic resonance myocardial perfusion imaging can not only detect myocardial ischemia early, but also clarify the location and extent of myocardial ischemia, and evaluate myocardial ischemia-reperfusion after treatment. It can provide immediate information on myocardial perfusion, such as: ventricular wall motion, ventricular wall thickness, left...

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Application Information

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IPC IPC(8): G06T17/00G06T9/00G06K9/62
CPCG06T17/00G06T9/001G06F18/23
Inventor 张明辉孟苗苗刘且根徐晓玲刘沂玲张凤芹
Owner NANCHANG UNIV
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