Kelvin K L Wong1,2, Steve C N Hui3. 1. Engineering Computational Biology, School of Computer Science and Software Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6000, Australia. kelvin.wong@uwa.edu.au. 2. Centre for Biomedical Engineering, Department of Electronic and Electrical Engineering, University of Adelaide, Adelaide, SA, 5005, Australia. kelvin.wong@uwa.edu.au. 3. Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Sha Tin, N.T., Hong Kong, China.