Nonintrusive noncontacting frequency-domain photothermal radiometry of caries

Yasser H. El-Sharkawy; Bassam Abd-Elwahab

doi:10.1117/12.843769

23 March 2010 Nonintrusive noncontacting frequency-domain photothermal radiometry of caries

Yasser H. El-Sharkawy, Bassam Abd-Elwahab

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76224F (2010) https://doi.org/10.1117/12.843769
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

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 tissues to study the sub-surface deposition of laser radiation, a task that may be difficult or impossible for many optical methods due to excessive scattering and absorption. In this paper considers the achievements of Pulsed Photothermal Radiometry using IR camera in the investigation of physical properties of biological materials and the diagnostics of the interaction of laser radiation with biological materials. A three-dimensional heat conduction formulation with the use of three-dimensional optical diffusion is developed to derive a turbid frequency-domain PTR model. The present photo-thermal model for frequency-domain PTR may prove useful for non-contact; non-invasive, in situ evaluate the depth profilometric imaging capabilities of FDPTR in monitoring carious and artificial subsurface lesions in human teeth.

Citation Download Citation

Yasser H. El-Sharkawy and Bassam Abd-Elwahab "Nonintrusive noncontacting frequency-domain photothermal radiometry of caries", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76224F (23 March 2010); https://doi.org/10.1117/12.843769

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