Joseph C Lee1,2, Francis T Delaney3. 1. Department of Medical Imaging, The Prince Charles Hospital, Chermside, QLD, 4032, Australia. joseph.lee@health.qld.gov.au. 2. Faculty of Medicine, University of Queensland, St Lucia, QLD, 4072, Australia. joseph.lee@health.qld.gov.au. 3. Department of Radiology, Mater Misericordiae University Hospital, Eccles St, Dublin, D07 R2WY, Ireland.