WorldCat Identities

Piron, Vianney (1976-....).

Works: 1 works in 2 publications in 1 language and 2 library holdings
Roles: Author
Publication Timeline
Most widely held works by Vianney Piron
Spectroscopie optique résolue en temps et en fréquence de structures tissulaires homogènes et hétérogènes : modélisation et simulation par la méthode des éléments finis : application au diagnostic médical by Vianney Piron( Book )

2 editions published in 2006 in French and held by 2 WorldCat member libraries worldwide

The need to find noninvasive methods more efficient than the current methods for breast cancer detection has improved the development of near infrared spectroscopy last years. Because of the low absorption of tissue structures in this wavelengths range, it offers the possibility of studying tissue characteristics just observing the propagation of a laser wave as the one of a light source scattered by the particles composing the medium. The diffused photons obey the diffusion equation. In this study, a model based on the finite element method is computed in order to model the propagation of light in the generally used tissue geometries. This model allows, on the one hand, to investigate the detection of disturbing structures included within the slab of thickness d, and, on the other hand, to characterize some physiological parameters by determining the optical properties of semi-infinite bilayered structures. Two detection methods are proposed: a time-gated method, and a frequency domain method. These two techniques, taking into account noise dependence, offer possibilities of lateral detection of about 0.12d. A depth discrimination method is also proposed. This one rests on functions revealed by means of the photons mean time of flight. In the case of a bi-layered medium, the fat layer thickness influences the measured absorption coefficient mua of the muscle layer. A law to express mua according to the adipose tissue thickness is given for realistic muscular structures. This work leads to comfort the establishment of noninvasive methods in the field of biomedical technologies
Audience Level
Audience Level
  Kids General Special  
Audience level: 0.91 (from 0.91 for Spectrosco ... to 0.91 for Spectrosco ...)

French (2)