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Proceedings Paper

Study of inhomogeneities in turbid media: experimental and numerical results
Author(s): N. A. Carbone; Héctor O. Di Rocco; Daniela I. Iriarte; Juan A. Pomarico; Héctor F. Ranea-Sandoval; Pamela Pardini; M. Victoria Waks-Serra
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Paper Abstract

Near Infrared diffuse transmission of light through tissue is a tool for noninvasive imaging for diagnostic purposes. Most of the research has been focused over breast cancer imaging; however, major efforts have been done in cerebral tomography and topography imaging, as well as small animal organs imaging systems. In this work, we investigate the transmitted light profiles when scattering and absorbing cylindrical inhomogeneities are submerged at different depths inside slabs of turbid media. We analyze the transilluminance profiles when the phantom is scanned using both, CW and time resolved detection. The study of the spatial profiles obtained with CW light, shows an apparently contradictory effect when the absorption coefficient of the inclusion is higher than that of the bulk. In this case, the intensity profiles displays a peak of higher intensity where the inclusion is located, as it would be expected for a less absorbing inclusion. The experiments were compared and analyzed with a theoretical model for cylindrical inclusions and Monte Carlo simulations implemented in a Graphic Processing Unit (GPU).

Paper Details

Date Published: 3 November 2011
PDF: 7 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80118P (3 November 2011); doi: 10.1117/12.902166
Show Author Affiliations
N. A. Carbone, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)
Héctor O. Di Rocco, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)
Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)
Daniela I. Iriarte, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)
Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)
Juan A. Pomarico, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)
Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)
Héctor F. Ranea-Sandoval, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)
Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)
Pamela Pardini, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)
M. Victoria Waks-Serra, Univ. Nacional del Ctr. de la Provincia de Buenos Aires (Argentina)


Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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