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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 8 — Jul. 30, 2009

Robust multiparameter method of evaluating the optical and thermal properties of a layered tissue structure using photothermal radiometry

Anna Matvienko, Andreas Mandelis, and Stephen Abrams  »View Author Affiliations


Applied Optics, Vol. 48, Issue 17, pp. 3192-3203 (2009)
http://dx.doi.org/10.1364/AO.48.003192


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Abstract

The thermal and optical properties of multilayered dental tissue structure, the result of the surface-grown prismless layer on enamel, were evaluated simultaneously using multiparameter fits of photothermal radiometry frequency responses. The photothermal field generated in a tooth sample with near-infrared laser excitation was described using a coupled diffuse-photon-density and thermal wave model. The optical (absorption and scattering) coefficients and thermal parameters (spectrally averaged infrared emissivity, thermal diffusivity and conductivity) of each layer, as well as the thickness of the upper prismless enamel layer, were fitted using a multiparameter simplex downhill minimization algorithm. The results show that the proposed fitting approach can increase robustness of the multiparameter estimation of tissue properties in the case of ill-defined multiparameter fits, which are unavoidable in in vivo tissue evaluation. The described method can readily be used for noninvasive in vitro or in vivo characterization of a wide range of layered biological tissues.

© 2009 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(170.1850) Medical optics and biotechnology : Dentistry
(170.5270) Medical optics and biotechnology : Photon density waves
(170.7050) Medical optics and biotechnology : Turbid media
(170.6935) Medical optics and biotechnology : Tissue characterization

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: March 31, 2009
Manuscript Accepted: May 1, 2009
Published: June 5, 2009

Virtual Issues
Vol. 4, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Anna Matvienko, Andreas Mandelis, and Stephen Abrams, "Robust multiparameter method of evaluating the optical and thermal properties of a layered tissue structure using photothermal radiometry," Appl. Opt. 48, 3192-3203 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-48-17-3192

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