Laurent Risser - CNRS / Institut de Mathématiques de Toulouse

Laurent Risser, PhD
Research engineer with CNRS
Institut des mathématiques de Toulouse

Bureau 204, bâtiment 1R1
Université Paul Sabatier
118 route de Narbonne
31062, Toulouse Cedex 9
+33 (0)5 61 55 88 19

Welcome to my website! Below is a brief summary of my career and studies. More details are given in the rest of the website.

Career:

2012-: Fellow research engineer at CNRS - Toulouse Mathematics Institute (IMT), France.

2011: Research assistant at the Biomedical Image Analysis Laboratory with Julia A. Schnabel (now Invited fellow until 2014). Institute of Biomedical Engineering, University of Oxford, UK.

2009-2010: Research assistant at the Biomedical Image Analysis Group and the Institute for Mathematical Sciences with Daniel Rueckert and Darryl Holm. Imperial College, London, UK.

2007-2008: Research assistant at the Computer Assisted Neuroimaging Laboratory with Philippe Ciuciu. Neurospin, CEA Saclay, France.

2003-2007: PhD at the Fluid Mechanics Institute of Toulouse with Franck Plouraboué. Paul Sabatier University, Toulouse, France.

2003-2006: Lecturer in the Department of Mathematics and Computer science. Paul Sabatier university, Toulouse, France.

Studies:

2002-2003: Master 2 in Computer Science. Major in Image analysis. Paul Sabatier university, Toulouse, France.

2000-2002: Licence 3, Master 1 in Mathematical Engineering. Major in Scientific Computing (PDEs and optimization). Paul Sabatier university, Toulouse, France.

1998-2000: Licence 1,2 in Mathematics, Computer Science and applications. Paul Sabatier university, Toulouse, France.

Awards and Grants:

2013: PI of an AO1/Université Paul Sabatier grant with J.M. Loubes, J. Bigot , G. Gadat (IMT), M. Mescam, C. Fonta, K. Strelnikov (CerCo Toulouse) and F.X. Vialard (Paris Dauphine)

2012: Travel grant CNRS / University of Oxford collaboration scheme. Grant obtained in collaboration with Julia A. Schnabel.

2010: Co-author with Darryl D. Holm (Principal Investigator) and François-Xavier Vialard of the ERC projet: Five Grand Challenges in Computational Anatomy.

2008: French national prize "La recherche" 2008 - human health mention. Prize obtained with the team members Franck Plouraboué, Caroline Fonta, Peter Cloetens and Xavier Descombes on my PhD work. This prize rewards pluridisciplinary research works.

2006: PI of a grant "extension of PhD" from the Fondation pour la Recherche Médicale (French Foundation for Medical Research) with F. Plouraboué and C. Fonta.

Softwares / Structuring projects:

uTIlzreg: Diffeomorphic registration of 3D images available on sourceforge. Explanations about uTIlzreg are given here.

CampuStat: Establishing the link between pluridisciplinary labs/companies and the team of statistics at Institut de Mathématiques de Toulouse: here.

Journal papers:

Cifor A., Risser L., Chung D., Anderson E.M., Schnabel J.A.: Hybrid Feature-based Diffeomorphic Registration for Tumour Tracking in 2-D Liver Ultrasound Images IEEE Transactions on Medical Imaging 2013 (link).

Baluwala H.Y., Risser L., Schnabel J.A., Saddi K.A.: Towards a Physiologically Motivated Registration of Diagnostic CT and PET/CT of Lung Volumes. Medical Physics 40(02), 2013 (link).

Risser L., Vialard F.X., Baluwala H.Y., Schnabel J.A.: Piecewise-Diffeomorphic Image Registration: Application to the Motion Estimation between 3D CT Lung Images with Sliding Conditions Medical Image Analysis 2012, (link).

Bruveris M., Risser L., Vialard F.X.: Mixture of Kernels and Iterated semidirect Product of Diffeomorphisms Groups. SIAM Multiscale Modeling and Simulation 10 (4), pp: 1344-1368, 2012, (link).

Guibert R., Fonta C., Risser L., Plouraboué F.: Coupling and robustness of intra-cortical vascular territories NeuroImage. Accepted 13.04.12 (link).

Vialard F.X., Risser L., Rueckert D., Holm D.: Diffeomorphic Atlas Estimation using Geodesic Shooting on Volumetric Images Annals of the British Machine Vision Association, 2012, (link).

Risser L., Vialard F.X., Wolz R., Murgasova M., Holm D., Rueckert D., ADNI: Simultaneous Multiscale Registration using Large Deformation Diffeomorphic Metric Mapping. IEEE Transactions on Medical Imaging DOI: 10.1109/TMI.2011.2146787, 2011, (link).

Vialard F.X., Risser L., Rueckert D., Cotter C.J.: Diffeomorphic 3D Image Registration via Geodesic Shooting using an Efficient Adjoint Calculation. International Journal of Computer Vision DOI: 10.1007/s11263-011-0481-8, 2011, (link).

Risser L., Vincent T., Forbes F., Idier J., Ciuciu P. Min-max extrapolation scheme for fast estimation of 3D Potts field partition functions. Application to the joint detection-estimation of brain activity in fMRI. Journal of Signal Processing Systems. 60(1), DOI:10.1007/s11265-010-0505-6, 2010 (link)

Ciuciu P., Vincent T., Risser L., Donnet S. A joint detection-estimation framework for analysing within-subject fMRI data. Journal de la Société Française de Statistique. 151(1):58-89, 2010 (link)

Vincent T., Risser L., Ciuciu P., Idier J. Unsupervised spatial mixture modelling for within-subject analysis of fMRI data. IEEE Transactions on Medical Imaging 29(4):1059-1075, 2010 (link)

Risser L., Plouraboué F., Cloetens P., Fonta C. A 3D-investigation shows that angiogenesis in primate cerebral cortex mainly occurs at capillary level. International Journal of Developmental Neuroscience. 27(2), pp. 185-196, 2008, (link).

Risser L., Plouraboué F., Descombes X. Gap Filling in Vessel Networks by Skeletonization and Tensor Voting. IEEE Transactions on Medical Imaging. 27(5), pp. 674-687, 2008, (link).

Risser L., Plouraboué F., Steyer A., Cloetens P., Le Duc G, Fonta C. From homogeneous to fractal normal and tumorous micro-vascular networks in the brain. Journal of Cerebral Blood Flow and Metabolism. 27, pp. 293-303, May 2006, (link).

Conference and workshops with proceedings:

Fiot J.B., Risser L., Cohen L., Fripp J., Vialard F.X.: Local vs global descriptors of hippocampus shape evolution for Alzheimer's longitudinal population analysis MICCAI Workshop on Spatiotemporal Image Analysis for Longitudinal and Time-Series Image Data (MICCAI-STIA'12) - LNCS. Nice, 2012.

Risser L., Heinrich M.P., Matin T., Schnabel J.A.: Piecewise-diffeomorphic registration of 3D CT/MR pulmonary images with sliding conditions IEEE International Symposium on Biomedical Imaging (ISBI'12). Barcelona, 2012.

Cifor A., Risser L., Chung D., Anderson E.M., Schnabel J.A.: Hybrid feature-based Log-demons registration for tumour tracking in 2-D liver ultrasound images IEEE International Symposium on Biomedical Imaging (ISBI'12). Barcelona, 2012.

Bhushan M., Schnabel J.A., Heinrich M.P., Risser L., Brady M., Jenkinson M.: Motion Correction and Parameter Estimation in dceMRI sequences: Application to Colorectal Cancer. International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI'11) - Lecture Notes in Computer Science. Toronto, 2011.

Risser L., Baluwala H. Schnabel J.A.: Diffeomorphic registration with sliding conditions: Application to the registration of lungs CT images. International Conference on Medical Image Computing and Computer Assisted Intervention - Worshop on Pulmonary Image Analysis (MICCAI-PIA'11). Toronto, 2011.

Risser L., Heinrich M.P., Rueckert D., Schnabel J.A.: Multi-modal diffeomorphic registration using mutual information: Application to the registration of CT and MR pulmonary images. International Conference on Medical Image Computing and Computer Assisted Intervention - Worshop on Pulmonary Image Analysis (MICCAI-PIA'11). Toronto, 2011.

Risser L., Vialard F.X., Serag A., Aljabar P., Rueckert D.: Construction of Diffeomorphic Spatio-temporal Atlases using Kärcher means and LDDMM: Application to Early Cortical Development International Conference on Medical Image Computing and Computer Assisted Intervention - Worshop on Image Analysis of Human Brain Development (MICCAI-IAHBD'11). Toronto, 2011.

Vialard F.X., Risser L., Holm D.D., Rueckert D.: Diffeomorphic Atlas Estimation using Kärcher Mean and Geodesic Shooting on Volumetric Images. Medical Image Understanding and Analysis (MIUA'11). (Top ranked paper) London, 2011.

Risser L., Vialard F.X., Wolz R., Holm D., Rueckert D. Simultaneous Fine and Coarse Diffeomorphic Registration: Application to the Atrophy Measurement in Alzheimer's Disease. International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI'10) - Lecture Notes in Computer Science. Beijing, 2010.

Zhang D.P., Risser, L., Vialard F.X., Friman O., Neefjes L., Mollet N., Niessen W., Rueckert D. Coronary Motion Estimation Using Probability Atlas and Diffeomorphic Registration from CTA. International Workshop on Medical Imaging and Augmented Reality (MIAR'10) - Lecture Notes in Computer Science Beijing, 2010.

Risser L., Vialard F.X., Murgasova M., Holm D., Rueckert D. Large Diffeomorphic Registration using Fine and Coarse Strategies. Application to the brain growth characterization. International Workshop on Biomedical Image Registration (WBIR'10) - Lecture Notes in Computer Science 6204, pp. 186--197. Lübeck, 2010.

Zhang D.P., Risser, L., Friman O., Neefjes L., Mollet N., Niessen W., Rueckert D. Nonrigid Registration and Template Matching for Coronary Motion Modeling from 4D CTA. International Workshop on Biomedical Image Registration (WBIR'10) - Lecture Notes in Computer Science. Lübeck, 2010.

Zhang D.P., Risser L., Metz C., Mollet N.R., Niessen W., Rueckert D. Coronary artery motion modeling from 3D cardiac CT sequences. IEEE International Symposium on Biomedical Imaging (ISBI'10). Rotterdam, 2010.

Risser L., Vincent T., Forbes F., Idier J., Ciuciu P. How to deal with brain deactivation in the joint detection-estimation framework? Human Brain Mapping (HBM'10) - Top ranked abstract, Barcelona, Spain, June 2010.

Risser L., Idier J., Ciuciu P. Extrapolation schemes for fast ISING field partition functions estimation. IEEE International Conference on Image Processing (ICIP'09). Cairo, Egypt, November 2009.

Risser L., Vincent T., Ciuciu P., Idier J., Extrapolation scheme for fast ISING field partition functions estimation. Application to fMRI time course analysis. Internatinal Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI'09). London, UK, September 2009.

Risser L., Vincent T., Ciuciu P., Idier J., Schémas d'extrapolation de fonctions de partition de champs de Potts. Application à l'analyse d'image en IRM fonctionnelle. Groupe de Recherche et d'Etudes du Traitement du Signal (GRETSI'09). Dijon, France, September 2009

Fouque A.L., Ciuciu P., Risser L., Vincent T. Mélanges spatiaux gaussiens multivariés pour la classification de paramètres hémodynamiques en IRM fonctionnelle Groupe de Recherche et d'Etudes du Traitement du Signal (GRETSI'09). Dijon, France, September 2009

Risser L., Vincent T., Ciuciu P. Extrapolation Scheme For Fast 3D Ising Field Partition Function Estimation. Application to Bayesian Analysis of Within Subject fMRI Data. Human Brain Mapping (HBM'09).

Vincent T., Risser L., Ciuciu P. Spatially adaptive mixture modeling for analysis of fMRI time series. Human Brain Mapping (HBM'09).

Fouque A.L., Ciuciu P., Risser L. Multivariate spatial Gaussian mixture modeling for statistical clustering of hemodynamic parameters in functional MRI. International Conference on Acoustics, Speech, and Signal Processing (ICASSP'09). Taiwan, April 2009

Risser L., Plouraboué F., Descombes X. Vascular network topology extraction from 3D high resolution X-ray images using tensor voting. 3rd International Conference on Approximation Methods and numerical Modeling in Environment and Natural Resources (MAMERN). Pau, France, 2009

Risser L., Ciuciu P., Aso T., Le Bihan D. Brain activation detection using diffusion-weighted and BOLD fMRI: a comparative study. International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI'08). Workshop on Computational Diffusion MRI. New York, September 2008

Risser L., Plouraboué F., Fonta C. Angiogenesis in brain : a comparative study of local and organizational vascular structures. Neuroscience'08. Washington, USA, 2008.

Risser L., Plouraboué F., Fonta C. Micro-vascular maturation in cerebral cortex: a quantitative high resolution study. Forum of European Neuroscience. Geneva, Switzerland, 2008.

Risser L., Plouraboué F., Fonta C., Steyer A. Cortical micro-vascular inhomogeneities: a high resolution 3D investigation 13th Annual Meeting of the Organization for Human Brain Mapping (HBM). Chicago, USA, 2007.

Risser L., Plouraboué F., Descombes X. Gap Filling in D Vessel Like Patterns with Tensor Voting. 2nd International Conference On Computer Vision Theory and Applications (VISAPP). Barcelona, Spain, 2007.

Risser L., Plouraboué F., Cloetens P., Steyer A., Fonta C. Maturation of marmoset cortical cerebral vascular networks : high-resolution 3D investigations. 35th annual meeting Society for Neuroscience. Washington, DC, 2005, 370.17.

Risser L., Plouraboué F., Fonta C., Cloetens P., Steyer A. Volumes élémentaires représentatifs dans les réseaux microvasculaires. 7èmes Journées d'Etude sur les Milieux Poreux. Bordeaux, France, 2005.

Risser L., Plouraboué F., Cloetens P., Steyer A, Leduc G., Renaud L., Fonta C. Normal and tumoral cerebral vascular networks: high resolution 3D investigations. Novel targeting drugs and radiotherapy. Toulouse, France, 2005, p39

Fonta C., Risser L., Plouraboué F., Renaud L., Cloetens P., Steyer A. X-Ray high resolution vascular network analysis in the cerebral cortex. 4th Forum of European Neuroscience. Lisboa, Portugal, 2004, AO17.8

Misc:

Google scholar profile: here.

DBLP profile: here.

Last update: 24.10.2012