Fast magnetic resonance cardiac real-time cine imaging method and system

Abstract

The invention discloses a fast magnetic resonance cardiac real-time movie imaging method and system. The fast magnetic resonance cardiac real-time cine imaging method includes: using an interleaved acquisition method to perform parallel under-acquisition on all frames of cardiac data collected by each channel to obtain under-acquisition data; using a variable density sampling method to down-acquire the under-acquisition data. Obtain the under-sampled signal; use the compressed sensing reconstruction method to reconstruct the under-sampled signal to obtain an image with curl artifacts; use Fourier transform to convert the image with curl artifacts into K-space data, and use an interleaved acquisition method for parallel processing Under-acquisition, the under-acquisition K-space data is obtained; the GRAPPA reconstruction method is used to reconstruct the under-acquisition K-space data, and an imaging image without curling artifacts is obtained. The fast magnetic resonance cardiac real-time cine imaging method and system can remove curling artifacts without additional acquisition of K-space data, and can obtain better quality images at higher acceleration times; and does not require the subject's breath-holding cooperation during scanning.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a fast magnetic resonance cardiac real-time movie imaging method and system. Background technique [0002] Magnetic resonance cardiac real-time cine imaging is an imaging mechanism that obtains a series of images of cardiac motion at a high frame rate. It is often used clinically to detect cardiac function. During the scan, the subject needs to hold his breath to obtain multiple cardiac motion cycles of the subject. The complete K-space data within. However, if the subject suffers from heart disease or the subject is a child, it is often difficult to cooperate with repeated breath-holding requirements, and the scanning time cannot be too long. Therefore, it is necessary to reduce the amount of data collected in each frame as much as possible on the premise that the imaging quality is clinically acceptable, and increase the sampling speed, thereby reducing the ...

AI Technical Summary

Problems solved by technology

[0003] At present, the real-time cine imaging process of magnetic resonance heart needs to collect multiple frames of images in the heart motion cycle, which requires a high scanning time. The commonly used parallel imaging technology is limited by the performance of the radio frequency receiving coil and the reconstruction algorithm, which will reduce the signal-to-noise ratio of the image. , so its acceleration factor cannot be too large

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