Meeting Banner
Abstract #3047

Motion Characterisation Using FID Navigators and Spatial Pattern of MRI Coil Arrays

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, Lausanne, Switzerland; 4Departments of Radiology, Universities of Lausanne and Geneva, Switzerland

In this work we investigate the potential to characterise rigid-body head motion by monitoring free induction decay (FID) changes over time in coil arrays. The technique makes use of the fact that FID signals detected by local coil elements change as a function of object distance. Assuming a sufficient coverage of the scanned object with local coil elements, the inverse problem of back-calculation of the rigid motion parameters may be solvable. In this investigation, a framework to derive these motion parameters is developed and first results are shown from phantom and human scans using a 32-channel head coil array.