Email: portico-services@ucl.ac.uk
Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
- Professor of Image Processing
- Dept of Computer Science
- Faculty of Engineering Science
My
undergraduate degree was in Physics from Cambridge University, after which I
moved to UCL Medical Physics where I completed a PhD in 1990. I moved from
there directly to a lectureship in the department of Computer Science UCL where
I am currently professor of image processing, and a visiting professor in the
department of Mathematics. I have been a visiting scientist at the University
of Eastern Finalnd, Kuopio, Finland, the Université Jean Monnet, St.Etienne, France and the
Physikalisch-Technische Bundesandtalt, Berlin. I was a
visiting scholar at the Mathematical Research Institute Berkeley in 2010, and
at the Isaac Newton Institute special seminar on inverse problems in 2011.


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).
I currently teach courses in Inverse Problems in Imaging and in Geometry of Images.
1992 | Doctor of Philosophy | University College London | |
1981 | Bachelor of Arts (Honours) | University of Cambridge |