MRI data compression and accelerated reconstruction method

Abstract

The invention discloses a magnetic resonance diffusion imaging data compression and accelerated reconstruction method, which comprises the steps of arranging magnetic resonance data, which is acquired by exciting a sequence for multiple times, of different acquisition coordinates to the same k space coordinates, and simultaneously performing arrangement on image echo signals and navigation echo signals which are acquired by exciting the sequence for multiple times; calculating a compression matrix by using k space data of two-dimensional navigation echo signals according to a preset data scale after compression; and simultaneously performing compression on the image echo data and the navigation signal data by using the acquired compression matrix. The method disclosed by the invention has the following advantages: a rearrangement operation is performed on diffusion imaging data, which is acquired by exciting the sequence for multiple times, of magnetic resonance, data acquired by multiple times of excitation and data acquired by a multi-channel coil are integrated, an excitation-coil dimension of data is constructed so as to perform compression, and the data scale is effectively reduced; effective acceleration is provided for a follow-up magnetic resonance reconstruction algorithm, and memory occupation is reduced at the same time; and image noises are reduced while efficient accelerated calculation is performed, and the image quality is guaranteed.

Description

technical field [0001] The invention relates to the field of magnetic resonance, in particular to a method for compressing and accelerating reconstruction of magnetic resonance diffusion imaging data. Background technique [0002] Parallel imaging technology based on multi-channel coil acquisition has become one of the most efficient and mainstream technologies in the field of magnetic resonance in recent years. The role of parallel imaging technology is to effectively reduce the acquisition time of magnetic resonance imaging, thereby promoting the development and clinical application of magnetic resonance technology. With the development of parallel imaging technology, multi-coil array design has also become an engineering category of magnetic resonance research. On the premise of a reasonable design, the more channels of the coil array, the higher the signal-to-noise ratio it can provide, and the greater the acquisition acceleration of parallel imaging technology. Howeve...

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Problems solved by technology

In this case, even if the multi-coil data is compressed using the traditional coil compression technique, a large number of excitations still leads to a large amount of data, as well as problems such as long calculation time and large memory usage, which hinder high-resolution magnetometry. Application of Resonance Diffusion Imaging Technology in Clinical and Scientific Research

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