Superconducting high-field magnetic resonance center frequency calculation method and system

Abstract

The embodiment of the invention discloses a superconducting high-field magnetic resonance center frequency calculation method and system, and the method comprises the steps: obtaining an original FIDsignal, carrying out the data cleaning of the original FID signal, and obtaining waveform data corresponding to the water and fat frequency of a human body; analyzing and counting the waveform data toobtain structural data of the wave crest information; judging the validity of the wave crest information according to the structure data of the wave crest information, and counting the wave crest information of the valid wave crest; acquiring a water-fat deviation value, and acquiring an optimal water frequency position and a corresponding fat frequency position according to the peak informationof the effective peak and the water-fat deviation value; and acquiring a center frequency according to the water frequency position and the fat frequency position. According to the embodiment of the invention, the accurate water frequency position can be automatically and quickly found, and the optimal water frequency position can be analyzed and calculated when interference signals such as signals generated by silica gel fillers, a plurality of fat frequencies and differences of different channels exist.

Description

technical field

[0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a method and system for calculating the center frequency of superconducting high-field magnetic resonance. Background technique

[0002] In a superconducting magnetic resonance system, the center frequency is the basis for determining the physical center of the signal and the gradient encoding center, and plays a very important role in the accurate acquisition and reconstruction of the signal. Therefore, it is necessary to accurately search the center frequency at the place where the signal is collected. The water frequency and fat frequency are calculated together to determine the exact center frequency position. The magnetic resonance imaging system mainly collects the signal of H protons in the human body, and under the condition of high-field magnetic resonance (≥3Tesla), there are many complicated situations of water and fat inclusions.

[0003] The exist...

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