Magnetic resonance diffusion imaging method based on multiple excitation

Abstract

The invention discloses a magnetic resonance diffusion imaging method based on multiple excitation. The method comprises the steps of activating a tested object, and collecting signals of the tested object in every excitation process, so as to obtain reduced k space data activated for multiple times; recovering the k space data of a data point to be restored according to the reduced k space data activated for multiple times collected in a preset scope where the data point to be restored, so as to obtain k space data activated for multiple times; carrying out inverse Fourier change on the k space data activated for multiple times, so as to obtain images or data activated for multiple times; and combining the images or data activated for multiple times to generate a needed image. According to the method provided by the embodiment of the invention, the motion artifacts among different activations cannot be effectively eliminated, the images can be diffused in multiple collecting way, the high resolution of the images can be provided, the deformation of the images can be reduced, and the rebuilding process can be simplified.

Description

technical field [0001] The invention relates to the field of magnetic resonance technology, in particular to a method for magnetic resonance diffusion imaging based on multiple excitations. Background technique [0002] Magnetic resonance diffusion imaging technology is currently 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. Therefore, The technology has developed rapidly in the past decade and has gradually become an important routine clinical examination and scientific research tool. Currently, the diffusion imaging method used clinically is usually single-shot echo planar imaging (Echo Planar Imaging, EPI for short). The characteristic of single-shot EPI imaging is that the scanning time is short, and it is less affected by the mot...

AI Technical Summary

Problems solved by technology

However, there are still defects in the phase correction in the image domain, that is, the navigation data and the imaging data need to be consistent in the image domain, and in many cases, the acquisition bandwidth of the navigation data and the imaging data cannot be exactly the same, so the phase error Inaccurate, it will affect the final image quality

In this case, image registration between imaging data and navigation data is required, which will cause problems for imaging and reconstruction

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