Integration of an External Motion Tracking System with the MR Scanner for Highly Accurate Real-Time Prospective Motion Correction
Zaitsev M, Speck O, Dold C, Hennig J
University Hospital Freiburg
Motion artefacts in MRI are a significant problem. Remedial approaches proposed typically require severe modifications of imaging techniques. The use of an external motion tracking hardware in combination with prospective real-time update of the imaging coordinates allows MR imaging of moving objects with the vast majority of standard techniques. High resolution imaging places stringent requirements on both spatial and temporal accuracy of the motion data. In this work a high precision stereoscopic motion tracking system is integrated with a scanner, a novel method for coordinate calibration is proposed and the total latency of the system is measured experimentally.