Magnetic resonance imaging method and system for eliminating motion artifact based on dynamic tracking technology

Abstract

The invention relates to the research field of magnetic resonance imaging and provides a method and a system for tracking a tested space attitude, dynamically adjusting imaging parameters of a scanner in real time and avoiding acquisition of motion artifact images in the acquisition process of magnetic resonance imaging data based on a computer vision target recognition and tracking technology. By adopting at least two video cameras for simulating stereoscopic vision of human eyes, a target is recognized, the tested space attitude is calculated, and space motion of the space attitude is monitored and judged. Once the motion occurs, parameters of the corrected space attitude are calculated immediately and are transmitted to the scanner through a transmission control protocol / internet protocol (TCP / IP), the imaging parameters of the scanner are adjusted in real time, the scanner is ensured to be capable of acquiring image data at a correct space position under the condition that the motion of the tested space attitude exists, and accordingly finally-obtained images are like images acquired under the condition that the motion of the tested space attitude does not occur. Therefore, acquired image data are stable and reliable in quality, the motion artifact is eliminated completely, and motion correction is not required in post-processing.

Description

technical field [0001] The invention relates to the field of magnetic resonance imaging research, and is a method and system for real-time correction of magnetic resonance image acquisition parameters based on computer vision target recognition and tracking technology to avoid acquisition of image data with motion artifacts. Background technique [0002] Magnetic resonance imaging has the characteristics of no damage, high soft tissue contrast, and slices in any direction. At the same time, the method of magnetic resonance imaging is flexible and can provide images with different types of contrast (or called contrast), which can not only provide tissue morphological information, but also reflect the functional characteristics of living biological tissues (water molecule diffusion, blood perfusion, cerebral Psychological function, iron deposition, metabolism level, etc.) and molecular level information, so magnetic resonance imaging has been widely used in medical clinical di...

AI Technical Summary

Problems solved by technology

This method uses an optical video system independent of magnetic resonance imaging, monitors the object through a camera, tracks and calculates the motion of the object through computer vision object recognition and tracking technology, and then transmits the estimated motion information to the magnetic resonance system in real time for dynamic modification. The imaging parameters of the pulse sequence program keep the relative relationship between the scanning plane and field of view and the scanned object unchanged, so that clear image data can always be obtained, and it completely solves the problem that the scanned person cannot keep still during the long-term data collection process. And the inevitable motion artifact problem

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