Hybrid Motion Correction: Latency Compensation In The Presence Of Respiratory Motion

Motivation: Prospective motion correction (PMC) techniques face challenges due to inherent latency and filter-induced delays, particularly impactful in cases of periodic motion, like breathing. Goal(s): This study examines how periodic motion affects PMC with increased latency and employs retrospective techniques to compensate for latency-induced discrepancies. Approach: Brain MRI scans were conducted on a volunteer performing exaggerated breathing using a PMC-enabled sequence. Retrospective motion correction was used to reverse latency-induced errors and compensate for residual motion. Results: The hybrid approach combining PMC and RMC yielded superior results when compared to no correction and PMC-only, emphasizing the importance of addressing latency in motion correction for MRI. Impact: Breathing motion can lead to suboptimal results in prospective motion correction. Implementing this technique broadens PMC's applicability, aiding its integration into clinical practice.