Terry Jones is a medical physicist who has been involved in the development and applications of positron emitting radioisotopes in medicine since 1968. When at the former Medical Research Council’s, Cyclotron Unit, at Hammersmith Hospital, London, he initiated the UK’s first PET program in the late 1970’s. He undertook developments in PET methodology which included collaborations with industrial manufacturers of PET scanners. Together with medical colleagues at the Royal Postgraduate Medical School at Hammersmith Hospital, he fostered the research applications of PET methodology in Neurology, Psychiatry, Oncology, Cardiology and Pulmonary Medicine. He was awarded an MRC travelling fellowship in 1972 to work at the University of Washington St Louis and the MGH in Boston, where he recorded the first image of human brain metabolism by using oxygen-15.