Tobias Kober1,2, Jos P. Marques1,3,
Rolf Gruetter1,4, Gunnar Krueger2
1Laboratory for functional and
metabolic imaging, Ecole Polytechnique Fdrale de Lausanne, Lausanne,
Switzerland; 2Advanced Clinical Imaging Technology, Siemens Suisse
SA - CIBM, Lausanne, Switzerland; 3Department of Radiology,
University of Lausanne, Switzerland; 4Departments of Radiology,
Universities of Lausanne and Geneva, Switzerland
Subject
motion is often affecting the quality of MRI data. In this work, we
investigate the feasibility to detect motion by monitoring repetitive FID
navigator signals from arrays of receive coils. Object motion is shown to
induce changes in the FID signal intensity. For proof of concept, the
technique was applied to structural MP-RAGE scans of the brain. Subject
motion was reliably detected. The technique has the potential to provide a
scan quality measure and motion parameters for real-time or retrospective
correction. It could be used in other MR sequences without time or signal
penalty.