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Proceedings Paper

Optical property determination of turbid media using frequency-domain infrared photothermal radiometry
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Paper Abstract

Among diffusion methods, photothermal radiometry (PTR) has the ability to penetrate and yield information about an opaque medium well beyond the range of conventional optical imaging. Owing to this ability, pulsed-laser PTR has been extensively used in turbid media such as biological tissue to study the sub-surface deposition of laser radiation, a task which may be difficult or impossible for conventional optical methods due to excessive scattering and absorption. In this work, the optical and thermal properties of tissue- like materials are observed using frequency-domain IR photothermal radiometry. An approximate 3D heat conduction formulation with the use of 1D optical diffusion is developed to derive a turbid frequency-domain PTR model. The agreement in the absorption and transparent scattering coefficients of model phantoms is investigated. The present opto-thermal model for frequency-domain PTR may prove useful for non-contact, non-invasive, in situ measurement of optical properties of tissues and other multiply-scattering media.

Paper Details

Date Published: 19 May 2000
PDF: 8 pages
Proc. SPIE 3916, Biomedical Optoacoustics, (19 May 2000); doi: 10.1117/12.386312
Show Author Affiliations
Andreas Mandelis, Univ. of Toronto and Materials Manufacturing Ontario (Canada)
Lena Nicolaides, Univ. of Toronto and Materials Manufacturing Ontario (Canada)
Yan Chen, Univ. of Toronto and Materials Manufacturing Ontario (Canada)
I. Alex Vitkin, Univ. of Toronto and Ontario Cancer Institute (Canada)


Published in SPIE Proceedings Vol. 3916:
Biomedical Optoacoustics
Alexander A. Oraevsky, Editor(s)

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