Magnetic resonance imaging method and device

Abstract

The embodiment of the invention provides a nuclear magnetic resonance imaging method and device. The method comprises a step of collecting data of multiple groups of different contrast images at a same scanning position, a step of carrying out undersampling on the data of each group of contrast images at a phase direction periphery and carrying out full sampling at a self calibration signal line in a k space, and obtaining sampling data, a step of taking coil sensitivity information as sharing information of each group of images in multiple groups of different contrast images, and forming a reconstruction data matrix by the coil sensitivity information and the to-be-reconstructed information of the multiple groups of different contrast images, a step of taking the sampling data and coil sensitivity smoothing information as input data, taking the reconstruction data matrix as an output, and forming a target function for solving the coil sensitivity information and the to-be-reconstructed information of the multiple groups of different contrast images, and a step of using a nonlinear iterative method to solve the target function, reconstructing the multiple groups of different contrast images, and calculating the coil sensitivity information.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a nuclear magnetic resonance imaging method and device. Background technique [0002] In the current magnetic resonance imaging method, the parallel magnetic resonance imaging technology uses a multi-channel phased array radio frequency receiving coil to receive signals, and uses the coil sensitivity information of different coil units to reconstruct the image of the under-sampled data, thereby reducing the amount of data sampling. , can still ensure better image reconstruction quality and achieve the purpose of shortening the scanning time. However, if the coil sensitivity estimation is inaccurate, the results of parallel imaging reconstruction often have aliasing artifacts, resulting in a decrease in image quality. Therefore, reconstruction of high-quality images from under-sampled data has always been a key core issue in the field of magnetic resonance imaging. . Th...

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Problems solved by technology

[0005] The embodiment of the present invention provides a nuclear magnetic resonance imaging method to solve the technical problem in the prior art that images with different contrasts cannot be reconstructed at the same time

[0006] The embodiment of the present invention also provides a nuclear magnetic resonance imaging device to solve the technical problem in the prior art that images with different contrasts cannot be reconstructed at the same time

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