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Optical coherence tomography correlated with a functional fluorescence imaging for detection and quantification of dental caries

Amaechi, Bennett T., Podoleanu, Adrian G.H., Mujat, Claudia, Dogariu, Aristide, Higham, Susan M., Jackson, David A. (2002) Optical coherence tomography correlated with a functional fluorescence imaging for detection and quantification of dental caries. In: SPIE Proceedings Series. 4619. pp. 253-258. Spie-Int Soc Optical Engineering (doi:10.1117/12.470493) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://www.dx.doi.org/10.1117/12.470493

Abstract

Fluorescence radiance loss in enamel following demineralisation has been correlated to the amount of mineral lost during the demineralisation. The correlation between fluorescence loss measured by Quantitative Light-induced Fluorescence (QLF) and the reflectivity loss measured by an en-face Optical Coherence Tomography (OCT) system was investigated in a demineralisation process to produce artificial caries. We used an OCT system which can collect A-scans (reflectivity versus depth graph), B-scans (longitudinal images) and C-scans (en-face images). The power to the sample was 250 μW, wavelength λ = 850 nm and the depth resolution in air 16 μm. Transversal and longitudinal images showed the caries lesion as volumes of reduced reflectivity. A-scans, which show the profile of the reflectivity versus depth of penetration into the tooth tissue, were used for quantitative analysis of the reflectivity loss. Both the fluorescence radiance and reflectivity of the enamel decreased with increasing demineralisation time. A linear correlation was observed between the percentage fluorescence loss measured by QLF and the percentage reflectivity loss measured by OCT. It was concluded that the decrease in reflectivity of the enamel during demineralisation, measured by OCT, could be related to the amount of mineral lost during the demineralisation process.

Item Type: Conference or workshop item (Proceeding)
DOI/Identification number: 10.1117/12.470493
Uncontrolled keywords: Luminescence ; Optical coherence tomography ; Reflectivity ; Minerals ; Quantitative analysis ; Teeth ; Tissues
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General) > R857.O6 Optical coherence tomography
R Medicine > RK Dentistry
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: Giles Tarver
Date Deposited: 27 Jul 2015 09:30 UTC
Last Modified: 29 May 2019 14:55 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49804 (The current URI for this page, for reference purposes)
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