Diffusion magnetic resonance imaging and reconstruction method

A magnetic resonance imaging and imaging technology, applied in magnetic resonance measurement, measurement using nuclear magnetic resonance imaging system, measuring magnetic variables, etc., can solve problems such as long excitation acquisition time, image blur resolution, and limitation of excitation times, etc., to achieve Effects of eliminating motion artifacts, improving image resolution, and correcting phase errors

Active Publication Date: 2014-03-26
TSINGHUA UNIV
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Problems solved by technology

However, the algorithm requires that the number of excitations (equivalent to the SENSE acceleration multiple) is relatively small relative to the number of array coils, otherwise it will be affected by the g-factor of parallel

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  • Diffusion magnetic resonance imaging and reconstruction method
  • Diffusion magnetic resonance imaging and reconstruction method
  • Diffusion magnetic resonance imaging and reconstruction method

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents coming within the spirit and scope of the appended claims.

[0027] In the description of the present invention, it should be understood that the terms "first", "second" and so on are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connect...

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Abstract

The invention discloses a diffusion magnetic resonance imaging and reconstruction method. The method includes the steps of S1, using multiple channel coils and adopting a multi-excitation diffusion imaging mode to carry out signal acquisition on tested targets to obtain k spatial data; S2, calculating a coil sensitivity figure and carrying out iterative initialization; S3, conducting iterative reconstruction on needed diffusion images on the basis of the POCS algorithm according to the collected k spatial data, the coil sensitivity figure obtained through calculation and initialization parameters. According to the method, not only is acquisition efficiency of signals improved, but also fuzzy artifacts and motion artifacts of the images are reduced, and image resolution is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a diffusion magnetic resonance imaging and reconstruction method. Background technique [0002] Diffusion imaging technology in magnetic resonance imaging is currently the only imaging method for measuring the diffusion movement of water molecules in vivo. In MRI diffusion imaging, the microstructure of tissues can be detected by applying diffusion gradients along multiple directions to perceive the microscopic motion of water molecules, which can obtain both structural information and functional information. Therefore, the technology has developed rapidly in the past decade and has gradually become an important routine clinical examination and scientific research tool. Due to technical limitations, the diffusion imaging method currently used in clinical practice usually adopts a single-shot echo planar imaging (EPI) sequence. The single-shot EPI imaging is ch...

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Application Information

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IPC IPC(8): G01R33/56G01R33/561
Inventor 马晓栋郭华张喆
Owner TSINGHUA UNIV
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