Method and device for obtaining magnetic resonance quantitative information map

Abstract

The embodiment of the present application discloses a method and device for obtaining a magnetic resonance quantitative information map. The method constructs multiple unknowns based on two sets of echoes collected at two different repetition times when running a three-dimensional gradient multi-echo sequence. for T 1 , and / or linear equations of proton density, and ensure that the number of linear equations constructed is not less than the number of unknowns in the linear equations, T is obtained by solving the solutions of the linear equations 1 Quantitative Map, Quantitative Map, and Quantitative Proton Density Map. Therefore, the method for obtaining the MRI quantitative information map provided in the embodiment of the present application transforms the process of obtaining the quantitative information map into the process of solving a linear equation system, which has the characteristics of obtaining three quantitative information maps at the same time in one data collection. When each quantitative information map is obtained, it is only necessary to collect the patient once, instead of scanning the patient multiple times, which saves a lot of data collection time and improves the data collection rate.

Description

technical field [0001] The present application relates to the technical field of magnetic resonance imaging, in particular to a method and device for obtaining a magnetic resonance quantitative information map. Background technique [0002] The basic principle of Magnetic Resonance Imaging (MRI) is: hydrogen nuclei (hydrogen atoms) in human tissue have spin motion to generate magnetic moments. Under the action of a strong and uniform main magnetic field, the spin magnetic moments of the spin hydrogen protons that are not regularly arranged will be arranged along the direction of the main magnetic field to form a macroscopic magnetic moment. Under the excitation of radio frequency pulses, the macroscopic magnetization vector will be flipped to the direction perpendicular to the main magnetic field, and can be received by the radio frequency receiving system during the process of precession and rotation, thereby generating electromagnetic induction signals, and various magneti...

AI Technical Summary

Problems solved by technology

One of the disadvantages of these technologies is that only a single quantitative information graph can be obtained each time, and multiple quantitative information graphs cannot be comprehensively used for accurate diagnosis; the second disadvantage is that the acquisition time is too long, sometimes as long as half an hour. The patient's tolerance is a big test; especially when multiple quantitative information maps need to be obtained, multiple sequences need to be collected separately, and the required acquisition time is the sum of the individual acquisition times of each quantitative information map

In addition, the data collection time is too long, and the patient may have involuntary movement during the data collection process, which will seriously affect the registration between the quantitative information maps, and bring troubles to quantitative analysis and diagnosis

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