Fast magnetic resonance heart real-time cine imaging method and fast magnetic resonance heart real-time cine imaging system

Abstract

The invention discloses a fast magnetic resonance heart real-time cine imaging method and a fast magnetic resonance heart real-time cine imaging system. The fast magnetic resonance heart real-time cine imaging method comprises the following steps: under-sampling all frames of heart data collected by each channel in parallel through use of a staggered collection method to get under-sampled data; down-sampling the under-sampled data through use of a variable-density sampling method to get an under-sampled signal; reconstructing the under-sampled signal through use of a compressed sensing reconstruction method to get an image with wraparound artifacts; converting the image with wraparound artifacts into K-space data through Fourier transform, and under-sampling the K-space data in parallel through use of the staggered collection method to get under-sampled K-space data; and reconstructing the under-sampled K-space data through use of a GRAPPA reconstruction method to get an imaging image without wraparound artifacts. According to the fast magnetic resonance heart real-time cine imaging method and the fast magnetic resonance heart real-time cine imaging system, wraparound artifacts can be removed without additionally collecting K-space data, an image of good quality can be obtained at higher acceleration multiple, and there is no need for a subject to hold his / her breath 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

Images