I am based in the Analysis Group at the Oxford Centre for Functional MRI of the Brain (FMRIB), supported by a Medical Research Council fellowship. I hold an honorary contract at the UCL Institute of Neurology, where I collaborate with the Methods Group of the Wellcome Trust Centre for Neuroimaging (WTCN/FIL) and the Dementia Research Centre (DRC). My main interests are structural and functional MRI, dementia and neurodegenerative disease, mathematical modelling and computational methods.