1. DIPI Laboratory, Ecole Nationale d'Ingénieurs de Saint-Etienne, 58 rue Jean Parot, Saint-Etienne Cedex 2 42023, France
2. Institute for Diagnostic Imaging Research, University of Windsor, 688 University Avenue West, Windsor, Ont. N9A 5R5, Canada
3. IfU Diagnostic Systems GmbH, 18 Gottfried-Schenker-Straße, Lichtenau 09244, Germany