Nuclear magnetic resonance imaging method and system

Abstract

The invention discloses a nuclear magnetic resonance imaging method and system. The method is provided based on a compact frame and some fixing sparsely variable limitations. The method comprises the steps of constructing an initial compact frame; establishing a reconstruction model of a target image based on a compact frame sparse expression item under the constraint condition of data fitting bound terms; conducting alternant iterative upgrade on the compact frame, a magnetic resonance image and k space data; obtaining a reconstructed target image according to the reconstruction model when iteration reaches the end condition. According to the nuclear magnetic resonance imaging method, sparsity of the magnetic resonance image is made full use of, firstly the initial compact frame is constructed through a two-dimensional filter theoretical compact frame, then in the image reconstructing process, an on-line study method is utilized to upgrade the compact frame, and a method of Bregman is utilized twice in the solving process to effectively solve the optimization problem of the model so as to achieve the fast and high-quality magnetic resonance image and to improve the imaging precision of the magnetic resonance image.

Description

technical field [0001] The invention belongs to the technical field of magnetic resonance, and in particular relates to a fast magnetic resonance imaging method and system based on a data-driven compact framework. Background technique [0002] Magnetic resonance imaging (MRI) uses the principle of nuclear magnetic resonance to image the internal structure of objects. In the application of medical diagnosis, MRI can obtain images of soft tissue sections of the human body, which is helpful to check the energy state of the brain and cerebral hemorrhage in patients with epilepsy, and is of great value in the diagnosis of degenerative diseases, so it has very important significance in clinical diagnosis. It has developed into one of the important technologies in the field of biomedical engineering. [0003] The imaging speed of magnetic resonance imaging is slow, and the movement of human organs and the movement of the subject during the imaging process will affect the clarity o...

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Problems solved by technology

[0017] The present invention aims at the defects of the magnetic resonance imaging method, and provides a magnetic resonance imaging method and system with a data-driven compact framework to solve the problems of the existing imaging methods such as low universality, high algorithm complexity and time-consuming, etc., and improve the imaging efficiency. speed and precision

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