Prospective Real Time Rigid Body Motion Correction at 7 Tesla Using Inductively Coupled Wireless NMR Markers.

Saikat Sengupta¹, Sasidhar Tadanki, John C . Gore¹, E. Brian Welch¹

We present the development and use of inductively coupled wireless NMR markers for prospective rigid body motion correction at 7 Tesla with the ultimate goal of real time head motion correction. Three 5 mm markers mounted on a phantom are located using a linear navigator. Motion is estimated in real time and imaging geometry is updated prospectively to compensate for motion with 6 degrees of freedom. Effective real time correction of complex motions in 1mm³ voxel size gradient echo imaging is demonstrated. Inductively coupled markers add significant benefits in flexibility, comfort, size and receiver channel requirements while maintaining performance.