Real Time Prospective Motion Correction for High Resolution In Vivo MRI Using an Optical Motion Tracking System
Zaitsev M, Speck O, Dold C, Hennig J
University Hospital Freiburg
Subject motion often causes substantial image quality degradation in high-resolution MRI. The sensitivity of standard 2D and 3D imaging methods to motion may be reduced by use of navigator echoes, which, however, lengthen the measurement and require additional excitation RF pulses disturbing the steady state. In this work the possibility of performing prospective motion correction by interfacing the MR scanner with a fast high-precision stereoscopic motion tracking system is demonstrated. Applicability and limitations of this correction approach for high resolution brain imaging in the presence of strong subject motion are evaluated and discussed.