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; David A. Jackson

doi:10.1117/12.470481

14 June 2002 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, David A. Jackson

Proceedings Volume 4619, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications VI; (2002) https://doi.org/10.1117/12.470481
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

Abstract

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(mu) W, wavelength (lambda) =850 nm and the depth resolution in air was 16 micrometers . 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 of the 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 performed 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 demineralization.

Citation Download Citation

Bennett T. Amaechi, Adrian Gh. Podoleanu, John A. Rogers, Susan M. Higham, Shane Dunne, and David A. Jackson "Versatile optical coherence tomography system applied to the imaging of teeth", Proc. SPIE 4619, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications VI, (14 June 2002); https://doi.org/10.1117/12.470481

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