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



Amaechi, Bennett T, Podoleanu, Adrian Gh, Mujat, Claudia, Dogariu, Aristide C, Higham, Susan M ORCID: 0000-0002-4097-4702 and Jackson, David A
(2002) Optical coherence tomography correlated with a functional fluorescence imaging for detection and quantification of dental caries. SPIE Proceedings, 4619. pp. 253-258.

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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: Article
Additional Information: Available online 14 June 2002. Conference date: January 19 2002 Conference Location: San Jose, CA, USA Conference Title: Coherence Domain Optical Methods in Biomedical Science and Clinical Applications VI .
Uncontrolled Keywords: Optical coherence tomography, low coherence interferometry, quantitative light-induced fluorescence, confocal imaging, dental imaging, caries diagnosis, dental caries, demineralisation, enamel, optical methods
Subjects: ?? RK ??
Divisions: Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences > School of Dentistry
Depositing User: Symplectic Admin
Date Deposited: 15 Oct 2009 10:49
Last Modified: 15 Mar 2024 09:04
DOI: 10.1117/12.470493
Publisher's Statement : ©2003 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. Optical coherence tomography correlated with a functional fluorescence imaging for detection and quantification of dental caries Bennett T. Amaechi, Adrian Gh. Podoleanu, Claudia Mujat, Aristide C. Dogariu, Susan M. Higham, and David A. Jackson, Proc. SPIE 4619, 253 (2002), DOI:10.1117/12.470493 http://dx.doi.org/10.1117/12.470493
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URI: https://livrepository.liverpool.ac.uk/id/eprint/1143