Water-fat separation magnetic resonance imaging method

A magnetic resonance imaging, water-fat separation technology, applied in medical science, diagnosis, diagnostic recording/measurement, etc., can solve the problems of increased scanning time, inability to completely eliminate image artifacts, signal amplitude fluctuations, etc., to eliminate periodic fluctuations , the effect of removing image banding artifacts, high signal-to-noise ratio

Active Publication Date: 2018-05-08
INSITUTE OF BIOPHYSICS CHINESE ACADEMY OF SCIENCES
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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; seco

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  • Water-fat separation magnetic resonance imaging method

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Embodiment Construction

[0031] The present invention will be described in detail below with reference to the drawings and embodiments.

[0032] The present invention provides a water-fat separation magnetic resonance imaging method, which can remove band artifacts of equilibrium steady-state free precession imaging sequence, simplify the water-fat separation process, shorten the scanning time, and is especially suitable for high-field and ultra-high Field magnetic resonance system. The method includes the following steps:

[0033] 1) Such as figure 1 As shown, the integrated steady-state free precession imaging sequence (iSSFP) that can adjust multiple echo times is set, and the signal amplitude does not change with the frequency offset, and the banding artifacts of the bSSFP sequence can be removed.

[0034] The specific process is:

[0035] The integrated steady-state free precession sequence is based on the equilibrium steady-state free precession sequence by applying a defocusing gradient G to obtain a ...

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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...

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Application Information

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IPC IPC(8): A61B5/055A61B5/00
CPCA61B5/055A61B5/4872A61B5/4875A61B5/7203A61B5/7257
Inventor 孙开宝薛蓉左真涛王炯炯卓彦
Owner INSITUTE OF BIOPHYSICS CHINESE ACADEMY OF SCIENCES
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