Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Yves Goussard"'
Three-Dimensional Microwave Imaging: Fast and Accurate Computations with Block Resolution Algorithms
Publikováno v:
Sensors, Vol 20, Iss 21, p 6282 (2020)
This paper considers the microwave imaging reconstruction problem, based on additive penalization and gradient-based optimization. Each evaluation of the cost function and of its gradient requires the resolution of as many high-dimensional linear sys
Externí odkaz:
https://doaj.org/article/f38717db73314d2198d79d22815ffc00
Autor:
Stéphanie Tan, Gilles Soulez, Patricia Diez Martinez, Sandra Larrivée, Louis-Mathieu Stevens, Yves Goussard, Samer Mansour, Carl Chartrand-Lefebvre
Publikováno v:
PLoS ONE, Vol 11, Iss 4, p e0154292 (2016)
PURPOSE:Metallic artifacts can result in an artificial thickening of the coronary stent wall which can significantly impair computed tomography (CT) imaging in patients with coronary stents. The objective of this study is to assess in vivo visualizat
Externí odkaz:
https://doaj.org/article/c7c6474b5c50483fa364f3cce521a58f
Publikováno v:
Optimization and Engineering. 21:1537-1561
Statistical image reconstruction in X-Ray computed tomography yields large-scale regularized linear least-squares problems with nonnegativity bounds, where the memory footprint of the operator is a concern. Discretizing images in cylindrical coordina
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40deef33d8f20629f43625c4881271d9
https://doi.org/10.1007/s11081-020-09484-0
https://doi.org/10.1007/s11081-020-09484-0
Publikováno v:
Medical Physics. 45:579-588
PURPOSE Iterative reconstruction algorithms in computed tomography (CT) require a fast method for computing the intersection distances between the trajectories of photons and the object, also called ray tracing or system matrix computation. This work
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc62bcd40ea6bce4ecb12d2e32e45941
https://doi.org/10.1002/mp.12714
https://doi.org/10.1002/mp.12714
Publikováno v:
Ultrasound in Medicine & Biology
Ultrasound in Medicine & Biology, Elsevier, 2017, 43 (12), pp.2871-2881
Ultrasound in Medicine & Biology, Elsevier, 2017, 43 (12), pp.2871-2881. ⟨10.1016/j.ultrasmedbio.2017.08.005⟩
Ultrasound in Medicine & Biology, Elsevier, 2017, 43 (12), pp.2871-2881
Ultrasound in Medicine & Biology, Elsevier, 2017, 43 (12), pp.2871-2881. ⟨10.1016/j.ultrasmedbio.2017.08.005⟩
International audience; Erythrocyte aggregation is a non-specific marker of acute and chronic inflammation. Although it is usual to evaluate this phenomenon from blood samples analyzed in laboratory instruments, in vivo real-time assessment of aggreg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6906e09504244a90ecbf3f5ea3520051
https://doi.org/10.1016/j.ultrasmedbio.2017.08.005
https://doi.org/10.1016/j.ultrasmedbio.2017.08.005
Autor:
Philippe De Tillieux, Yves Goussard
Publikováno v:
2018 International Applied Computational Electromagnetics Society Symposium (ACES).
Magnetic induction tomography aims to reconstruct the passive electric properties of an object by measuring its scattered magnetic field. Current state-of-the-art numerical techniques are based on differential formulations such as the finite element
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::615a5f1ec513f5fe50074d9bfad5f5b6
https://doi.org/10.23919/ropaces.2018.8364169
https://doi.org/10.23919/ropaces.2018.8364169
Publikováno v:
Medical Physics. 42:6376-6386
Purpose: The present work evaluates an iterative reconstruction approach, namely, the ordered subsets convex (OSC) algorithm with regularization via total variation (TV) minimization in the field of cone-beam optical computed tomography (optical CT).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af1ef7fe46758288964aab4f9bcb4090
https://doi.org/10.1118/1.4931604
https://doi.org/10.1118/1.4931604
Publikováno v:
Medical Physics. 42:1505-1517
Purpose: The present work proposes an iterative reconstruction technique designed for x-ray transmission computed tomography (CT). The main objective is to provide a model-based solution to the cone-beam CT reconstruction problem, yielding accurate l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbb3e87a166a35fac0cee47a2425b3c4
https://doi.org/10.1118/1.4914143
https://doi.org/10.1118/1.4914143
Autor:
Yves Goussard, Philippe De Tillieux
Publikováno v:
2016 IEEE Conference on Antenna Measurements & Applications (CAMA).
In magnetic induction tomography of biological tissue, an alternating magnetic field is used to induce eddy currents inside tissues, which in turn generate a secondary magnetic field. This perturbation of the field depends on the dielectric propertie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1faa2d12f79769c5fee5e7ed31504a1
https://doi.org/10.1109/cama.2016.7815790
https://doi.org/10.1109/cama.2016.7815790
Publikováno v:
2016 IEEE International Ultrasonics Symposium (IUS).
Erythrocytes have the tendency to aggregate under blood stagnation and low shear conditions. This phenomenon increases scattering and the echogenicity of blood. Increased erythrocyte aggregation (EA) has been proposed as a surrogate marker for real-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58b5f8ba0c4c2aba7c7158fea5f82e48
https://doi.org/10.1109/ultsym.2016.7728440
https://doi.org/10.1109/ultsym.2016.7728440