A motion signal extraction method and device for self-gated three-dimensional cardiac imaging

Abstract

The invention provides a motion signal extracting method and device for self-gating three-dimensional cardiac imaging, and relates to the technical field of three-dimensional cardiac imaging. The method includes the steps that according to the TureFISP sequence, cardiac cine imaging data are obtained by adopting a multi-echo three-dimensional radial mixed collecting mode; signal values of multiple points are obtained from radial sampling lines of all collecting layers in the cardiac cine imaging data, and average values of the signal values of the multiple points are determined to serve as navigation signals; the navigation signals are subjected to inverse Fourier transformation to be transformed into an image domain, and heartbeat and breathing motion mixed signals are obtained through weighting; the heartbeat and breathing motion mixed signals are filtered through a band-pass filter to obtain heartbeat signals and breath signals; according to the heartbeat signals and the breath signals, the cardiac cine imaging data are arrayed and synchronized again to generate three-dimensional cardiac images. The problem that in the prior art, the quality of the rebuilt cardiac cine images is affected as obtained motion signals are inaccurate is solved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional cardiac imaging, in particular to a motion signal extraction method and device for self-gated three-dimensional cardiac imaging. Background technique [0002] At present, thanks to the advantages of magnetic resonance imaging, such as excellent resolution of soft tissue, imaging at any angle, and non-destructive testing, cardiac magnetic resonance imaging (CMRI) provides a powerful tool for evaluating the structure and function of the heart. It has been applied to the scientific research of cardiac shape, function, perfusion, myocardial ischemia and activity. However, the traditional magnetic resonance imaging is slow, takes too long for imaging, and is easily affected by the heartbeat and respiratory movement of the examinee, resulting in the introduction of motion artifacts in the imaging process, which limits the clinical application of CMRI technology in heart, cardiovascular and oth...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a motion signal extraction method and device for self-gated three-dimensional cardiac imaging to solve the problem that the current three-dimensional whole-heart dynamic film imaging is affected by the eddy current effect, and the position of the navigation signal of each layer is shifted, resulting in the acquisition of The motion signal is inaccurate, which affects the reconstruction of cardiac movie images

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