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.