Ed Nicol is a Consultant Cardiologist at the Royal Brompton Hospital, and National Heart and Lung Institute, Imperial College, London. He has wide experience in cardiovascular imaging including cardiovascular CT, MRI, echocardiography and nuclear cardiology. He was involved in establishing the clinical cardiovascular CT service at both the Royal Brompton and the Royal Berkshire Hospitals.; James Stirrup is a Clinical Research Fellow in Cardiac Imaging at the Royal Brompton Hospital and National Heart and Lung Institute, Imperial College, London. He has experience in nuclear cardiology and cardiovascular computed tomography, holding both CBNC and CBCCT certification in addition to Level 3 accreditation from the Society for Cardiovascular Computed Tomography.; Andrew Kelion is Consultant Cardiologist and Director of Imaging at Harefield Hospital, Harefield, UK. He qualified from the University of Oxford, and trained in cardiology in London, Reading and Oxford. He is an experienced nuclear and echo cardiologist. He is a former President of the British Nuclear Cardiology Society and co-author of the Oxford Handbook of Nuclear Cardiology.; Simon Padley is a Consultant Radiologist at the Royal Brompton Hospital and Chelsea and Westminster Hospital. He qualified from Westminster Medical School, University of London, and trained in Radiology in London, Cambridge and Vancouver. He is an experienced cardiothoracic imager and interventionalist.