Multi-excitation magnetic resonance diffusion imaging method based on multilayer simultaneous excitation

Abstract

The invention provides a multi-excitation magnetic resonance diffusion imaging method based on multilayer simultaneous excitation. The method comprises steps: multilayer simultaneous excitation pulses are used for carrying out multiple excitations on a measured object, and during each excitation process, signal acquisition is carried out on the measured object through multichannel coils so as to acquire multi-excitation multichannel sample-reducing k space data; according to the multi-excitation multichannel sample-reducing k space data, each-excitation complete multichannel k space data are restored; inverse Fourier transform is carried out on the each-excitation complete multichannel k space data respectively to obtain multi-excitation multichannel image domain data; and the multi-excitation multichannel image domain data are combined to generate a needed image. According to the multi-excitation magnetic resonance diffusion imaging method based on multilayer simultaneous excitation provided by the embodiment of the invention, the image resolution can be improved, image deformation can be reduced, and the imaging speed is improved.

Description

technical field [0001] The invention relates to the field of magnetic resonance technology, in particular to a multi-excitation magnetic resonance diffusion imaging method in which multiple layers are simultaneously excited. 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. At present, the diffusion imaging method used clinically is usually single-shot echo planar imaging (Echoplanar imaging, referred to as EPI). The characteristic of single-shot EPI imaging is that the scanning time is s...

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Problems solved by technology

At present, multi-layer simultaneous excitation technology has been widely used in brain functional imaging and single-shot diffusion imaging, but has not been wid

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