Prospective Rigid-Body Motion Correction Using Miniature Wireless RF-Coils as Position Tracking Probes

Melvyn B. Ooi¹, Murat Aksoy¹, Julian R. Maclaren¹, Ronald D. Watkins¹, Roland Bammer¹

The ability to track the positions of miniature RF coils in the MRI scanner has been the foundation of several recent advances in prospective motion correction. The current work introduces the use of multiple wireless markers for rigid-body motion tracking. Each wireless marker is a miniature RF coil that is not connected to the MR receiver via traditional coaxial cables, but rather transmits its signal wirelessly via inductive coupling with the nearby imaging head-coil. Wire-free prospective real-time motion correction is demonstrated in a moving phantom and brain.