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4 publications déposées sur HAL:
[tel-01875748] Diffuse optical tomography and fluorescence for tumour detectionTime-Resolved Diffuse Optical Tomography (TR-DOT), the main subject of this thesis, is a method for retrieving specific information on optical properties (absorption and diffusion) of biological tissues. The goal of the project is to build a machine for measurements (tomograph), perhaps portable, for reconstructing images in 2D/3D for the optical maps of a patient or an object with a sufficient resolution to be used in a medical environment (hospitals) in order to perform preclinical diagnosis. This technic has the advantage to be non-invasive and a non-irradiation technique. In this thesis, we are interested to the reconstruction problem. A study of the forward and inverse problem is proposed using the diffusion approximation model for contact and non-contact measurements. The reconstruction is treated as an optimization problem based on adjoint methods.
Tue, 25 Sep 2018 01:19:56 +0000
[hal-01694694] Hemodynamic forces tune the arrest, adhesion and extravasation of circulating tumor cells[...]
Wed, 14 Mar 2018 16:48:13 +0000
[hal-01258643] Mathematical modeling and numerical simulation of a bioreactor landfill using Feel++In this paper, we propose a mathematical model to describe the functioning of a bioreactor landfill, that is a waste management facility in which biodegradable waste is used to generate methane. The simulation of a bioreactor landfill is a very complex multiphysics problem in which bacteria catalyze a chemical reaction that starting from organic carbon leads to the production of methane, carbon dioxide and water. The resulting model features a heat equation coupled with a non-linear reaction equation describing the chemical phenomena under analysis and several advection and advection-diffusion equations modeling multiphase flows inside a porous environment representing the biodegradable waste. A framework for the approximation of the model is implemented using Feel++, a C++ open-source library to solve Partial Differential Equations. Some heuristic considerations on the quantitative values of the parameters in the model are discussed and preliminary numerical simulations are presented.
Thu, 10 May 2018 02:04:05 +0000
[hal-01082527] Diffuse Optical Tomography For Tumour Detection Diffuse Optical Tomography For Tumour DetectionTime-resolved diffuse optical tomography aims to reconstruct images for internal parts of a body (diffusive objects owning one or several inclusions, small animals, ...) from its boundary measures. This poster gives an overview of the experimental setup created by the ICube/IMIS team and the mathematical model used for the reconstruction. Numerical results are obtained using FEEL++, a C++ library for finite element methods.
Wed, 17 Oct 2018 01:18:29 +0000