My interests are in Inverse Problems with particular interest in Image Reconstruction in Medical Imaging. I have been  a member of the editorial board of the Institute of Physics journal “Inverse Problems” since 2000, and Editor-In-Chief since 2015. I am widely known as the one of the originators of the field of Diffuse Optical Tomography (DOT) ,and my review papers are among the highest cited in their respective journals. Since joining CMIC in 2005 I have expanded my interests to the application of inverse problems in other medical imaging areas including Diffusion Tensor MRI, SPECT, PET and digital tomosynthesis. A common theme in several of these applications is a computational forward model based on solving the Radiative Transport Equation (RTE) or its approximations, and large scale optimisation techniques for the reconstruction problem. In addition the ill-posed nature of the inverse problem calls for sophisticated regularisation techniques based on Bayesian priors. In the majority of medical imaging modalities either the useful contrast mechanism is of low resolution, or high resolution images are of limited contrast. In the last decade there has been a growth of interest in “Imaging from Coupled Physics”, in which, rather than using the same physical field for probing and measurement, with a contrast caused by perturbation, the idea is to exploit the generation of a secondary physical field which can be measured in addition to, or without, the often dominating effect of the primary probe field. One of the most successful is Photoacoustic Tomography (PAT), with other examples including MR-EIT, Ultrasound modulated Optical Tomography, and MR elastography. I was a guest editor of a special issue of Inverse Problems on this topic in 2012. By considering the reconstructed image in PAT as the input to a second inverse problem for the optical properties of tissue led to the development of the field of Quantitative PhotoAcoustic Tomography (QPAT).