MRI reconstruction using real-time motion tracking: A simulation study

Previous efforts to compensate for patient motion in MRI invariably assume that the patient is motionless for some part of the scan. In this paper, we propose the use of motion-tracking data to enable motion-correction during the entire scan, including the acquisition stage. Using a simulated MRI scanner, we compare the different ways to use the motion-tracking data (both retrospectively and prospectively) and compare the reconstruction results to motion compensation using navigator echoes. The results show that full motion compensation can reduce motion artifacts that navigator methods miss.