Motion-Informed Deep Learning for Human Brain Magnetic Resonance Image Reconstruction Framework

Area of Science:

• Medical Imaging
• Artificial Intelligence
• Biomedical Engineering

Background:

• Motion artifacts affect approximately 30% of clinical MRI scans, degrading image quality.
• Current deep learning models address image reconstruction and motion correction separately.
• Existing methods fail to explicitly model patient motion within deep learning reconstruction frameworks.

Purpose of the Study:

• To develop a novel deep learning method for simultaneous MRI acceleration and motion artifact correction.
• To integrate motion detection and correction directly into the deep learning reconstruction process.
• To create a "motion-informed" deep learning model for enhanced MRI data acquisition.

Main Methods:

• A novel deep learning architecture was developed, integrating a motion module as an auxiliary layer.
• The model was trained to be "motion-informed," enabling it to learn and correct for motion during reconstruction.
• Image reconstruction was performed using undersampled k-space data with the trained motion-informed deep learning model.

Main Results:

• The proposed motion-informed deep learning network demonstrated superior performance compared to conventional reconstruction methods.
• Experimental results confirmed the network's effectiveness in reconstructing high-quality MRI data from motion-degraded datasets.
• The method successfully addressed undersampling artifacts alongside motion-induced artifacts like blurring, ghosting, and ringing.

Conclusions:

• The developed motion-informed deep learning approach effectively corrects motion artifacts during MRI reconstruction.
• This integrated method offers a promising solution for accelerating MRI scans while maintaining high image quality.
• The findings suggest a new paradigm for deep learning-based MRI reconstruction that accounts for patient motion.