Joseph C Lee1,2, Vishva A Wijesekera3,4. 1. Department of Medical Imaging, The Prince Charles Hospital, Chermside, QLD, Australia. Joseph.Lee@health.qld.gov.au. 2. Faculty of Medicine, The University of Queensland, St Lucia, QLD, Australia. Joseph.Lee@health.qld.gov.au. 3. Department of Cardiology, The Prince Charles Hospital, Chermside, QLD, Australia. 4. Faculty of Medicine, The University of Queensland, St Lucia, QLD, Australia.