Prospective Head Motion Compensation by Updating the Gradients of the MRT

CHAPTER 16. Structural Magnetic Resonance Imaging Biomarkers in Neurodegenerative Disease

“…Tracking head motion using an external optical tracking device enables more rapid real-time motion correction without the need to modify pulse sequences, but requires additional expensive hardware. 16,17 A recently developed image-based approach for prospective motion correction in MRI (PROMO) allows for rapid real-time rigid-body motion tracking and correction through the use of spiral navigator scans interspersed within the dead time of standard image acquisition, keeping the coordinate system fixed with respect to the position of the brain. 6 The method employs non-iterative recursive filters that allow the technique to combine current position information with motion trajectory data to predict brain position in the upcoming acquisition.…”