Navigation magnetic resonance diffusion imaging method and device based on multiple excitations

Abstract

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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Problems solved by technology

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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