Magnetic resonance based dynamic imaging method and device

Abstract

A magnetic resonance based dynamic imaging method comprises the steps that dynamic data is under-sampled by adopting TGRAPPA technology; the data obtained through under-sampling, and second under-sampling is performed by adopting a variable-density sampling acceleration mode; a second-time under-sampling signal is reconstructed; simulation parallel under-sampling is conducted on K space data obtained after reconstruction in the TGRAPPA mode, a full-sampling automatic calibration data ACS is established according to the under-sampled data; the full-sampling automatic calibration data ACS is mapped to a space higher than a current space in dimension, and the weight coefficient of each coil is calculated in a novel space; the K space data undergoing the simulation parallel under-sampling is filled according to the weight coefficient, and second time of reconstruction is perform to generate a final image. The magnetic resonance based dynamic imaging method does not need additional acquisition of automatic calibration signals from a K space center, noise amplification caused by acceleration time increase in parallel imaging can be well inhibited under high acceleration times, and images high in signal to noise ratio can be obtained.

Description

technical field [0001] The invention belongs to the field of magnetic resonance, and in particular relates to a dynamic imaging method and device of magnetic resonance. Background technique [0002] Magnetic resonance is a technique that uses static and radio-frequency magnetic fields to image human tissue. Magnetic resonance not only provides rich tissue contrast, but also is harmless to the human body, so it has become a powerful tool for medical clinical diagnosis. [0003] At present, the slow dynamic imaging speed of magnetic resonance has always been a major bottleneck restricting the rapid development of magnetic resonance technology. How to increase the scanning speed and reduce the scanning time under the premise of ensuring clinically acceptable imaging quality is particularly important. [0004] For magnetic resonance dynamic imaging technology, the current commercial fast imaging technology is mainly parallel imaging, including dynamic generalized automatic cal...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a dynamic imaging method of magnetic resonance to solve the problem that the existing dynamic imaging technology cannot effectively meet the requirements of dynamic imaging speed and imaging quality

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