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.