A Spectral Phase Correction Method

A phase correction and spectrum technology, used in magnetic resonance measurement, magnetic variable measurement, etc., can solve the problems of difficult model simulation of real signals, complex time-domain FID signals, etc., to achieve good anti-noise interference and reduce errors.

Active Publication Date: 2016-01-20
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

The disadvantage of this method is that the time domain FID signal is relatively complex, and it is difficult for the model to simulate the real signal

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  • A Spectral Phase Correction Method
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  • A Spectral Phase Correction Method

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Embodiment Construction

[0035] The present invention provides a spectrum phase correction method, including providing a spectrum to be corrected and a complex frequency domain model; using the complex frequency domain model to fit the spectrum to be corrected to perform phase correction on the spectrum to be corrected, the The spectrum to be corrected and the complex frequency domain model respectively include at least one corresponding sub-waveform.

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. figure 1 It is a schematic diagram of the spectrum phase correction process of the present invention. Including the following steps:

[0037]S101: Provide a wave spectrum to be corrected and a complex frequency domain model. Each peak of the spectrum to be corrected includes an absorption spectrum of a real part and a divergence spectrum of an imaginary part. In this embodiment, the spectrum to be corrected is magnetic resonanc...

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Abstract

The invention discloses a wave spectrum phase correction method. The method comprises providing a wave spectrum to be corrected and a complex frequency domain model; employing the complex frequency domain model to perform fitting on the wave spectrum to be corrected so as to carry out phase correction on the wave spectrum to be corrected, wherein the wave spectrum to be corrected and the complex frequency domain model respectively comprises at least one corresponding sub waveform, the complex frequency domain model comprises a model real part and a model imaginary part, and the wave spectrum to be corrected comprises a wave spectrum real part and a wave spectrum imaginary part; and respectively fitting the wave spectrum real part and the wave spectrum imaginary part through the model real part and the model imaginary part so as to carry out the phase correction on the wave spectrum to be corrected. By using the wave spectrum phase correction method, the zero-order phase deviation or the one-order phase deviation can be obtained according to wave spectrum signals, and better noise interference resistance property is provided.

Description

technical field [0001] The invention relates to a phase correction method, in particular to a spectral phase correction method. Background technique [0002] The real part of the magnetic resonance spectrum (Magnetic Resonance Spectroscopy, MRS) signal obtained after Fourier transform is the absorption spectrum, and the imaginary part is the dispersion spectrum. In practical applications, due to the phase offset or sampling delay between the transmitter and the receiver, the aliasing of the absorption type and the dispersion type often occurs in MRS, that is, phase deviation occurs. To obtain the desired pure absorption spectrum, phase correction is required. Among various types of phase deviations, the zero-order phase that is independent of frequency and the first-order phase that is linear with frequency have the greatest impact on MRS signals. [0003] Existing MRS phase correction methods mainly include Ernst integral method, dispersion-absorption plots (Dispersion-Ab...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01R33/44
Inventor王晓东李程
OwnerSHANGHAI UNITED IMAGING HEALTHCARE