Professor Koh is an expert in functional imaging and a pioneer in diffusion weighted MRI and whole-body MRI. He is an experienced speaker, course organiser and he lectures regularly at international conferences and courses. He is lead for the NIHR Clinical Research facility at the Royal Marsden, an elected fellow of the International Cancer Imaging Society from whom he received a gold medal in recognition of his outstanding contribution, 2013 Barclay Medal recipient and associate editor for Radiology (2011-2019).