Theoretical, experimental, and computational aspects of optical property determination of turbid media by using frequency-domain laser infrared photothermal radiometry
JOSA A, Vol. 18, Issue 10, pp. 2548-2556 (2001)
http://dx.doi.org/10.1364/JOSAA.18.002548
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Abstract
In this work, the optical and thermal properties of tissuelike materials are measured by using frequency-domain infrared photothermal radiometry. This technique is better suited for quantitative multiparameter optical measurements than the widely used pulsed-laser photothermal radiometry (PPTR) because of the availability of two independent signal channels, amplitude and phase, and the superior signal-to-noise ratio provided by synchronous lock-in detection. A rigorous three-dimensional (3-D) thermal-wave formulation with a 3-D diffuse and coherent photon-density-wave source is applied to data from model phantoms. The combined theoretical, experimental, and computational methodology shows good promise with regard to its analytical ability to measure optical properties of turbid media uniquely, as compared with PPTR, which exhibits uniqueness problems. From data sets obtained by using calibrated test phantoms, the reduced optical scattering and absorption coefficients were found to be within 20% and 10%, respectively, of the values independently derived by using Mie theory and spectrophotometric measurements.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(260.3060) Physical optics : Infrared
Citation
Lena Nicolaides, Yan Chen, Andreas Mandelis, and I. Alex Vitkin, "Theoretical, experimental, and computational aspects of optical property determination of turbid media by using frequency-domain laser infrared photothermal radiometry," J. Opt. Soc. Am. A 18, 2548-2556 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-10-2548
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