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Versatile optical coherence tomography system applied for imaging of teeth

Amaechi, Bennett T.; Podoleanu, Adrian Gh.; Rogers, John A.; Higham, Susan M.; Dunne, Shane and Jackson, David A. (2002) Versatile optical coherence tomography system applied for imaging of teeth. Proceedings of SPIE, 4619 . pp. 180-186. ISSN 0277-786X (Online); 1996-756X (Print)

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The utility of a versatile multifunctional standalone Optical Coherence Tomography (OCT)/confocal system for imaging dental tissue was investigated. The system can collect A-scan (reflectivity versus depth graph), longitudinal (B-scan) and en-face (C-scan) OCT images, simultaneously with a confocal image. The power to the sample was 250 jiW, wavelength x= 850 am and the depth resolution in air was 16 jm. The OCT images showed caries lesions as volumes of reduced reflectivity. Transversal images (C-scan) showed the en-face slices of the tooth tissue like in confocal microscopy. Longitudinal images showed the depth ofthe lesion into the tooth tissue as well as the different structural layers of sound tooth in the same way as seen in ultrasound images. A-scans preformed in locations selected in the en-face images provided quantitative data about the reflectivity versus depth. The confocal channel was extremely useful for guidance and it has also shown the integral of the intensity over depth at transversal locations. We concluded that OCT proved capable to detect an early caries lesion, to show the depth of the lesion into the tissue, and quantitatively assess the degree of demineralisation.

Item Type:Article
Additional Information:Available online 14 June 2002. Conference date: Monday 21 January 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 mterferometry; dental imaging; caries diagnosis; demineralisation; confocal imaging; enamel; dental caries; 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. Versatile optical coherence tomography system applied to the imaging of teeth Bennett T. Amaechi, Adrian Gh. Podoleanu, John A. Rogers, Susan M. Higham, Shane Dunne, and David A. Jackson, Proc. SPIE 4619, 180 (2002), DOI:10.1117/12.470481
ID Code:1144
Deposited On:15 Oct 2009 11:34
Last Modified:27 Jun 2013 16:49

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