1. Oxford University Computing Laboratory, Wolfson Building, Parks Road, Oxford OX1 3QD, UK
2. CREATIS-LRMN, 7 avenue Jean Capelle, INSA de Lyon, 69621 Villeurbanne Cedex, France
3. CBBL, IMIM/UPF, Barcelona Biomedical Research Park, C/Doctor Aiguader 88, 08003 Barcelona, Spain
4. Department of Medical Physics and Clinical Engineering, University of Sheffield, I Floor, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, UK
5. Centre for Computational Science, University College London, 20 Gordon Street, London WC1H 0AJ, UK
6. Center for Computational Imaging and Simulation Technologies in Biomedicine (CISTIB), Universitat Pompeu Fabra and CIBER-BBN, c/Tànger 122-140, 08018 Barcelona, Spain