Water-fat separation magnetic resonance imaging method

Abstract

The invention relates to a water-fat separation magnetic resonance imaging method. The method is particularly applicable to a high field and super high field magnetic resonance system. The method comprises the following steps of 1, setting an integrated stable-state free precession imaging sequence capable of adjusting multiple echo times; 2, imaging the same imaging area and acquiring a magneticresonance signal corresponding to each echo time; 3, conducting Fourier image rebuilding on the acquired magnetic resonance signal to obtain a magnetic resonance complex number image corresponding toeach echo time; 4, integrating magnetic resonance complex number image information corresponding to the multiple echo times, wherein the magnetic resonance plural number image information comprises anamplitude and a phase; adopting a water-fat separation algorithm to solve images of separated water and fat. The water-fat separation magnetic resonance imaging method can be widely applied to various magnetic resonance high field imaging systems, particularly a super high field imaging system.

Description

Technical field [0001] The invention relates to an imaging method, in particular to a water-fat separation imaging method suitable for magnetic resonance high field and ultra high field. Background technique [0002] Magnetic resonance water-fat separation imaging is of great significance in the diagnosis of diseases in the abdomen, breast, and limbs and joints. Water-fat separation imaging can quantitatively separate fat signals and water signals, avoid the interference of fat on the lesion area, and more clearly show normal tissues and lesion structures. At the same time, the quantitative information of fat content can also be used for the assessment of diseases such as bone marrow disease and fatty liver. Water-fat separation imaging can also remove MRI image artifacts caused by fat and improve image quality. [0003] Due to the advantages of fast imaging speed and high signal-to-noise ratio, equilibrium steady state free precession sequence (bSSFP) has gradually become a popu...

AI Technical Summary

Problems solved by technology

However, there are still many shortcomings in this method: first, the scan time increases linearly with the increase of the number of acquisitions at the same echo time point; second, even if the scan time increases, the signal amplitude still fluctuates with the frequency offset, and a reasonable scan Image artifacts cannot be completely eliminated in time

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