Magnetic resonant part K data image re-establishing method based on compound strange spectrum analysis

A technology of data image and magnetic resonance imaging, which is applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and measurement of magnetic variables, etc., which can solve problems such as obstacles, large phase estimation errors, and inconvenience in work and life

Inactive Publication Date: 2007-10-10
骆建华
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Problems solved by technology

[0005] (1) This kind of phase estimation error is large, and the picture usually has serious artifacts, please refer to Figure 2c and 2d for details
[0006] (2) The premise of this estimation method is that the phase of the image changes slowly, and its phase frequency is within the range of -n/16 to n/16. However, the phase of the magnetic resonance image is generally difficult to satisfy everywhere in the image space, a

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  • Magnetic resonant part K data image re-establishing method based on compound strange spectrum analysis
  • Magnetic resonant part K data image re-establishing method based on compound strange spectrum analysis
  • Magnetic resonant part K data image re-establishing method based on compound strange spectrum analysis

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[0057] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0058] The present invention collects part of K data from actual magnetic resonance equipment, and its phase encoding range is -N / 16 to N / 2-1, wherein N is the phase encoding number of complete K space data. Therefore, the method of using the complex singular spectrum analysis method to directly reconstruct the magnetic resonance image is called the complex singular spectrum analysis method (CSSA, Complex Singular Spectrum Analysis).

[0059] Before elaborating the overall working process and working principle of the present invention, in order to clarify its technical meaning more clearly, the following definitions need to be given at first:

[0060] Definition 1: Given a real or complex digital signal, the point whose difference is not zero is a singular point, and the difference value on the singular point is a singular value, and the sing...

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Abstract

A method for restructuring partial K data of magnetic resonance based on complex singular spectral analysis includes setting up magnetic resonant image mathematic model of complex coefficient weighting singular function and complex singular spectral analysis model, using partial K data information to carry out model parameter estimation and then utilizing said mathematic model and said spectral analysis model to carry out restructuring of magnetic resonant image.

Description

technical field [0001] The invention relates to the technical field of medical imaging detection, in particular to the technical field of magnetic resonance imaging, in particular to a method for image reconstruction of magnetic resonance partial K data based on complex singular spectrum analysis. Background technique [0002] With the continuous development of modern medical technology, magnetic resonance imaging (MRI) technology has become an indispensable means in the field of medical imaging detection. Among them, the magnetic resonance signal space (raw data space) is called K space, which is Fourier The space is transformed, the K space is sampled to the signal and then the modulus is taken after the inverse Fourier transform, and the nuclear magnetic resonance (MR) image is obtained. Part of the K-space data imaging can increase the scanning speed exponentially on the premise that the hardware and scanning methods remain unchanged. In K-space Cartesian coordinate gri...

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Application Information

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IPC IPC(8): G01R33/56
CPCG01R33/561
Inventor 骆建华朱跃敏
Owner 骆建华
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