Amaechi, Bennett T.; Podoleanu, Adrian Gh.; Mujat, Claudia; Dogariu, Aristide C.; Higham, Susan M. and Jackson, David A. (2002) Optical coherence tomography correlated with a functional fluorescence imaging for detection and quantification of dental caries. Proc. SPIE, 4619 . pp. 253-7.
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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 Ascans (reflectivity versus depth graph), B-scans (longitudinal images) and C-scans (en-face images). The power to the sample was 250 j.tW, wavelength 7 = 850 nm and the depth resolution in air 16 j.tm. 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
|Additional Information:||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:||R Medicine > RK Dentistry|
|Departments, Research Centres and Related Units:||Academic Faculties, Institutes and Research Centres > Faculty of Medicine > School of Dental Sciences|
|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|
|Deposited On:||15 Oct 2009 11:49|
|Last Modified:||23 Feb 2012 16:40|
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