Method and device for navigation magnetic resonance diffusion imaging based on multiple excitations
A technology of multiple excitation and imaging methods, which is applied in magnetic resonance measurement, measurement using nuclear magnetic resonance imaging system, and magnetic variable measurement, etc., can solve the problems of prolonging multiple excitation diffusion imaging scanning time and reducing image acquisition efficiency, etc. Achieve simple and easy implementation, improve image resolution, and remove artifacts
Active Publication Date: 2019-08-09
TSINGHUA UNIV
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However, this double-echo acquisition method will prolong the scanning time of multiple excitation diffusion imaging, thereby reducing the efficiency of image acquisition
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[0031] 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 and are intended to explain the present invention and should not be construed as limiting the present invention.
[0032] The multi-excitation-based navigation magnetic resonance diffusion imaging method proposed according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0033] figure 1 It is a flow chart of a multiple-excitation-based navigation magnetic resonance diffusion imaging method according to an embodiment of the present invention.
[0034] Such as figure 1 As shown, the multiple-excitation-based navigation magnetic resonance diffusion imaging method includes the foll...
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The invention discloses a navigation magnetic resonance diffusion imaging method and device based on multiple excitations. The method comprises the following steps of carrying out multiple excitations on a tested target, collecting a diffusion resonance signal, and collecting one-dimensional navigation data, wherein the one-dimensional navigation data are k space zero-crossing point data collected after multiple excitation imaging echoes; carrying out interpolation of adjacent k space points through a parallel imaging method, and recovering two-dimensional navigation information according to the one-dimensional navigation data; and correcting the phase of multiple excitation diffusion magnetic resonance imaging according to the two-dimensional navigation information to obtain a required image. The imaging method can reduce image deformation and improve the image resolution, can remove phase errors in multiple excitation diffusion imaging and artifacts generated by the phase errors, and can improve the image collection efficiency at the same time.
Description
technical field [0001] The invention relates to the technical field of magnetic resonance diffusion imaging, in particular to a navigation magnetic resonance diffusion imaging method and device based on multiple excitations. Background technique [0002] At present, magnetic resonance diffusion imaging technology is the only imaging method for measuring the diffusion movement of water molecules in vivo. It senses the microscopic movement of water molecules by applying a diffusion gradient to detect the microstructure of tissues, which can obtain both structural information and functional information. [0003] In the related art, the clinically used diffusion imaging method is usually single-shot echo-planar imaging. Single-shot echo-planar imaging is characterized by a short scan time and is less affected by the subject's motion. However, due to the small acquisition bandwidth along the phase-encoding direction, serious image distortion will occur at the junction of differe...
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IPC IPC(8): G01R33/56A61B5/055
CPCA61B5/055G01R33/56
Inventor 张喆郭华苑纯
Owner TSINGHUA UNIV