Dr Walker-Samuel studied Physics at Surrey University, and then went on to complete a PhD in Biophysics at the Institute of Cancer Research in 2007. In 2013 he was awarded a Wellcome Trust Senior Research Fellowship, and is now based in the Centre for Advanced Biomedical Imaging (CABI). His research focus is the characterisation of the tumour microenvironment, principally using MRI, optical techniques, x-ray CT and fluid dynamics. He has developed a number of novel molecular imaging techniques, including methods for measuring tumour cell sizes (VERDICT), interstitial fluid flow and pressures (EVAC) and glucose uptake and metabolism (glucoCEST). With an aim to translate new techniques into the clinic, he also investigates the application of imaging in a preclinical setting to assess the efficacy of novel anti-cancer therapies.