Research Topics
| Martin SchweigerSummaryAffiliation: University College London Country: UK Publications
| Collaborators
|
Detail Information
Publications
Reconstructing absorption and diffusion shape profiles in optical tomography by a level set techniqueM Schweiger
Department of Computer Science, University College London, Gower Street, London WC1E 6BT, UK
Opt Lett 31:471-3. 2006....
3D level set reconstruction of model and experimental data in Diffuse Optical TomographyM Schweiger
Department of Computer Science, University College London, Gower Street, London WC1E 6BT, UK
Opt Express 18:150-64. 2010....- Image reconstruction in optical tomography in the presence of coupling errorsMartin Schweiger
Centre for Medical Image Computing, University College London, London, UK
Appl Opt 46:2743-56. 2007..Reconstructions from simulated and experimental phantom data are presented, which show that including the coupling coefficients in the reconstruction greatly improves the recovery of absorption and scattering images... - Phenomenological model of diffuse global and regional atrophy using finite-element methodsOscar Camara
Centre for Medical Image Computing (CMIC, Department of Medical Physics and Bioengineering, Department of Computer Science, University College London, London WCEI 6BT, UK
IEEE Trans Med Imaging 25:1417-30. 2006..Results confirm the potential of the proposed methodology... - An inverse problem approach to the estimation of volume changeMartin Schweiger
Department of Computer Science, University College London
Med Image Comput Comput Assist Interv Int Conf Med Image Comput Comput Assist Interv 8:616-23. 2005..The proposed method has been tested with simulated and clinical data. Results suggest that the presented technique can be seen as an alternative for volume change estimation... - Local diffusion regularization method for optical tomography reconstruction by using robust statisticsAbdel Douiri
Department of Computer Science, University College London, Gower Street, London WC1E 6BT, UK
Opt Lett 30:2439-41. 2005..We compare results on simulated data for the Hubert function and two other standard regularization functionals, Tikhonov and total variation... - Gauss-Newton method for image reconstruction in diffuse optical tomographyMartin Schweiger
Department of Computer Science, University College London, Gower Street London WC1E 6BT, UK
Phys Med Biol 50:2365-86. 2005..We present simultaneous reconstructions of absorption and scattering distributions using this method for a simulated test case and experimental phantom data... - Information theoretic regularization in diffuse optical tomographyChristos Panagiotou
Department of Medical Physics and Bioengineering, University College London, Malet Place Engineering Building, Gower Street, London WC1E 6BT, UK
J Opt Soc Am A Opt Image Sci Vis 26:1277-90. 2009..We demonstrate its use on an image reconstruction framework and show significant computational savings... - Selection of regularization parameter for optical topographyTeresa Correia
University College London, Department of Medical Physics and Bioengineering, Gower Street, London WC1E 6BT, United Kingdom
J Biomed Opt 14:034044. 2009..We test them on two trial problems, deblurring and optical topography, and conclude that the L-curve method is the method of choice, though in particularly ill-posed problems, generalized cross-validation may provide an alternative... - 3D shape based reconstruction of experimental data in Diffuse Optical TomographyAthanasios D Zacharopoulos
University College London Department of Computer Science, Gower St, WC1E 6BT London, UK
Opt Express 17:18940-56. 2009.... - Simulation of local and global atrophy in Alzheimer's disease studiesOscar Camara-Rey
Center of Medical Image Computing, Unviersity College of London, UK
Med Image Comput Comput Assist Interv 9:937-45. 2006..An example of simulated data is shown and a visual evaluation protocol used by experts has been developed to assess the degree of realism of the simulated images. First results demonstrate the potential of the proposed methodology... - Linear and nonlinear reconstruction for optical tomography of phantoms with nonscattering regionsAdam P Gibson
Department of Medical Physics and Bioengineering, University College London, London WC1E 6JA, United Kingdom
Appl Opt 44:3925-36. 2005..This study supports the use of linear reconstruction for dynamic imaging but suggests that, in all cases, image quality is likely to improve if the clear regions are modeled correctly... - Optical tomography of a realistic neonatal head phantomAdam Gibson
Department of Medical Physics and Bioengineering, University College London, 11 20 Capper Street, London WC1E 6JA
Appl Opt 42:3109-16. 2003..The head-shaped mesh performed slightly better than the spherical mesh, particularly when the absorption of the central region of the phantom was increased... - Three-dimensional whole-head optical tomography of passive motor evoked responses in the neonateA P Gibson
Department of Medical Physics and Bioengineering, University College London, Malet Place Engineering Building, London WC1E 6BT, UK
Neuroimage 30:521-8. 2006..8 mm. These results suggest that optical tomography may provide an appropriate technique for non-invasive cot-side imaging of brain function... 
Image reconstruction in optical tomographyS R Arridge
Department of Computer Science, University College London, UK
Philos Trans R Soc Lond B Biol Sci 352:717-26. 1997..Nevertheless we strongly expect the functional nature of these images to have a high degree of clinical significance...- The finite-element method for the propagation of light in scattering media: frequency domain caseM Schweiger
Department of Medical Physics and Bioengineering, University College London, England
Med Phys 24:895-902. 1997..The model is validated against an analytic Green's function model for a circular geometry in the homogeneous case, and its accuracy is investigated for a range of mesh resolutions, optical parameters, and modulation frequencies... - Three-dimensional time-resolved optical mammography of the uncompressed breastLouise C Enfield
Department of Medical Physics and Bioengineering, University College London, London, WC1E 6BT, UK
Appl Opt 46:3628-38. 2007..Only half of the fibroadenomas scanned could be observed, but of those that could be detected, all but one revealed an apparent increase in blood volume and a decrease in scatter and oxygen saturation... - A method for generating patient-specific finite element meshes for head modellingA P Gibson
Department of Medical Physics and Bioengineering, University College London, UK
Phys Med Biol 48:481-95. 2003..However, data generated from a mesh of the best fit sphere were significantly different from data generated from the original neonatal head surface... - Time resolved optical tomography of the human forearmE M Hillman
Department of Medical Physics and Bioengineering, University College London, UK
Phys Med Biol 46:1117-30. 2001.... - Intradermal pre-exposure rabies vaccine elicits long lasting immunityDavid Brown
Virus Reference Department, Centre for Infections, HPA, London, UK
Vaccine 26:3909-12. 2008..Using a schedule that administers 0.6 ml of rabies vaccine over three clinic visits the boosting interval could be extended towards ten years; substantially cheaper than the standard licensed intramuscular dosing schedule... - Diffuse photon propagation in multilayered geometriesJan Sikora
Institute of the Theory of Electrical Engineering, Measurement and Information Systems, Warsaw University of Technology, Koszykowa 75, 00-661 Warsaw, Poland
Phys Med Biol 51:497-516. 2006..Results are presented comparing these solutions to an independent Monte Carlo model, and for an example three layered head model... - Computational calibration method for optical tomographyTanja Tarvainen
Department of Applied Physics, University of Kuopio, P O Box 1627, FIN 70211 Kuopio, Finland
Appl Opt 44:1879-88. 2005..The results show that the coupling coefficients of the sources and detectors can be estimated with good accuracy. Furthermore, the results show that the method can significantly improve the quality of reconstructed images... - Diffuse optical tomography with spectral constraints and wavelength optimizationAlper Corlu
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
Appl Opt 44:2082-93. 2005..Here the technique is described and tested in detail, and optimum wavelength sets for a broad range of chromophore combinations are discovered and analyzed... - Information content of data types in time-domain optical tomographyAngel R Pineda
University of Arizona, Tucson, Arizona 85724, USA
J Opt Soc Am A Opt Image Sci Vis 23:2989-96. 2006..A methodology for quantifying information content prior to reconstruction without assumptions of linearity is established, and the importance of signal and background characterization is highlighted... - Comparison between a time-domain and a frequency-domain system for optical tomographyIlkka Nissila
Helsinki University of Technology, Laboratory of Biomedical Engineering, 02015 HUT, Finland
J Biomed Opt 11:064015. 2006..The image quality of the reconstructions from the data measured with the two systems were compared with several quantitative criteria. In general a higher contrast was observed in the images calculated from the HUT data... - Uniqueness and wavelength optimization in continuous-wave multispectral diffuse optical tomographyAlper Corlu
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
Opt Lett 28:2339-41. 2003..Application of these concepts should significantly improve the fidelity of continuous-wave diffuse near-infrared optical tomography in tissues...