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Proceedings Paper

Optical characterization of thermal properties of biological tissue
Author(s): A. Gutierrez-Arroyo; C. Sánchez Pérez; N. Alemán-García; C. Piña-Barba
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Paper Abstract

In this work we utilize heat conduction measurements trough the photothermal beam deflection technique to characterize thermal properties of biological tissue. We design a heat flux sensor based on the phenomenon of photothermal laser beam deflection within a thermo-optic slab (acrylic), where the deflection is quantified by an optical fiber angle sensor. We analytically model the heat flux sensor response based on heat wave propagation theory that well agree with experimental data. We present heat conduction measurements on different tissues applying a heat pulse. Hence we obtain the thermal effusivity coefficient of bovine tendon and chicken liver and heart. It has been shown that thermal conduction depends on the tissue´s chemical composition as well on their structural arrangements, so any modification in tissue will affect on heat conduction rendering this method potentially useful as an auxiliary in biomedical studies. Nowadays there are several thermal effusivity and diffusivity measurement techniques with classic calorimetry (using thermistors) for research and industrial applications. However there are only few integrated optical devices already proposed, turning this optical technique in an innovative and alternative sensing system for thermal properties characterization.

Paper Details

Date Published: 18 November 2013
PDF: 6 pages
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785CX (18 November 2013); doi: 10.1117/12.2025877
Show Author Affiliations
A. Gutierrez-Arroyo, Univ. Nacional Autónoma de México (Mexico)
C. Sánchez Pérez, Univ. Nacional Autónoma de México (Mexico)
N. Alemán-García, Univ. Nacional Autónoma de México (Mexico)
C. Piña-Barba, Univ. Nacional Autónoma de México (Mexico)


Published in SPIE Proceedings Vol. 8785:
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
Manuel Filipe P. C. Martins Costa, Editor(s)

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