1 Interventional Radiology Department, Guy's and St Thomas' NHS Foundation Trust, St Thomas' Hospital, 1st Floor, Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK. sajal.patel@doctors.org.uk.
2 Interventional Radiology Department, Guy's and St Thomas' NHS Foundation Trust, St Thomas' Hospital, 1st Floor, Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK.
3 School of Biomedical Engineering & Imaging Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK.
4 Department of Interventional Radiology, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1, Place de1' Hôpital, 67000, Strasbourg, France.