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Abstract #5027

Prospective Motion Correction for MRI with a Single Retro-Grate Reflector Target and a Single Camera

Maxim Zaitsev1, Brian S. R. Armstrong2, Brian Andrews-Shigaki3, Todd P. Kusik2, Robert T. Barrows2, Kazim Gumus3, Ilja Y. Kadashevich4, Thomas Prieto5, Oliver Speck4, Thomas M. Ernst3

1Dept. of Radiology, Medical Physics, University Hospital Freiburg, Freiburg, Germany; 2Electrical Engineering and Computer Science, UW-Milwaukee, Milwaukee, WI, United States; 3John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, United States; 4Biomedical Magnetic Resonance, Otto-von-Guericke University,, Magdeburg, Germany; 5Medical College of Wisconsin, Milwaukee, WI, United States

Even subtle motions degrade MR image quality. With optical stereoscopic motion tracking it is possible to correct for head motion in 6 degrees of freedom. However, it is extremely difficult to realise in the tight geometric constraints of the MR scanner, while keeping up with comfort and handling requirements of the clinical routine. Optical motion tracking with a single retro-grate reflector (RGR) target and a single camera has a great potential due to its versatility and accuracy. Reported here is the successful implementation of a prospective real time motion correction with RGR tracking, aiming at developing easy-to-handle motion correction strategies.