Thomas Wagner is a consultant in nuclear medicine at the Royal Free Hospital in London. He is the PET/CT lead and his main interests are use of PET/CT in lung cancer and hematological malignancies and the role of PET/CT in infection and inflammation. Sandip Basu is consultant Physician and the Head, Nuclear Medicine Academic Programme of the Radiation Medicine Centre. He is actively involved in clinical patient services, research and post graduate training activities of the Centre. His special interests are Therapeutic Nuclear Medicine and PET/CT. He has authored over 350 publications in peer-reviewed journals, more than 25 text book chapters and serves as the Editorial Board member of multiple international journals including EJNMMI and NMC. He is the recipient of the prestigious Shanti Swarup Bhatnagar Prize 2012 in Medical Sciences, DAE Scientific and Technical Excellence Award 2007 & Group Achievement Award 2014 and Alavi-Mandell Award from the Education Research Foundation of Society of Nuclear Medicine, USA.