Method eliminating magnetic resonance imaging (MRI) gradient echo sequence odd-even phase difference

A technology of magnetic resonance imaging and phase difference, which is applied in the direction of using the nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, measurement of magnetic variables, etc., to achieve the effect of eliminating the odd-even phase difference
CN106646301AActive Publication Date: 2017-05-10EAST CHINA NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
EAST CHINA NORMAL UNIV
Publication Date
2017-05-10

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Abstract

The invention discloses a method eliminating magnetic resonance imaging (MRI) gradient echo sequence odd-even phase differences; the method comprises the following steps: 1, automatically segmenting a brain area on a modular figure obtained by MRI; 2, calculating phase images of the first 3 echo obtained by MRI so as to obtain an odd-even echo phase difference chart; 3, tagging singular points on the odd-even echo phase difference chart; 4, linear fitting the phase difference chart in three space directions so as to obtain slopes and intercepts of the three directions; 5, correcting the phase of even ocho. The method can eliminate the magnetic resonance imaging (MRI) multi-echo gradient echo sequence odd-even phase differences, and can automatically select the phase difference fitting area. Compared with a manual selection area method, the method is time saving and labor saving, more objective, and can provide an accurate result for a MRI quantify magnetic susceptibility chart.
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Description

technical field

[0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a method for eliminating the odd-even phase difference of a magnetic resonance imaging gradient echo sequence. Background technique

[0002] In recent years, with the improvement of the main magnetic field of the magnetic resonance imaging system, the application of multi-channel coils and the development of complex signal processing technology, the sensitivity of magnetic resonance imaging has been further improved, and magnetic resonance imaging can display the human body that could not be seen before. The fine structure of the cerebral cortex is partly due to changes in the local magnetic susceptibility of the brain. The image obtained by using the phase information discarded by general magnetic resonance imaging technology is called the magnetic resonance phase map. The high-resolution magnetic resonance phase map can display brain structures that cannot be...

Claims

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