1. X-Tek Systems Ltd (Nikon Metrology UK Ltd); Unit 5, Icknield Industrial Estate Tring U.K.
2. Department of Mechanical Engineering; KU Leuven; Celestijnenlaan 300 3001 Leuven Belgium
3. Department of Nuclear Medicine & Molecular Imaging; KU Leuven; UZ Herestraat 49 3000 Leuven Belgium