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Proceedings Paper

Near-infrared dental imaging using scanning fiber endoscope
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Paper Abstract

Near-infrared (NIR) wavelength range of 1300-1500nm has the potential to outperform or augment other dental imaging modalities such as fluorescence imaging, owing to its lower scattering coefficient in enamel and trans- parency on stains and non-cariogenic plaque. However, cameras in this wavelength range are bulky and expensive, which lead to difficulties for in-vivo use and commercialization. Thus, we have proposed a new imaging device combining the scanning fiber endoscopy (SFE) and NIR imaging technology. The NIR SFE system has the advantage of miniature size (1.6 mm), flexible shaft, video frame rate (7Hz) and expandable wide field-of-view (60 degrees). Eleven extracted human teeth with or without occlusal caries were scanned by micro-computed X-ray tomography (micro-CT) to obtain 3D micro-CT images, which serve as the standard for comparison. NIR images in reflection mode were then taken on all the occlusal surfaces, using 1310nm super luminescent diode and 1460nm laser diode respectively. Qualitative comparison was performed between near-infrared im- ages and micro-CT images. Enamel demineralization in NIR appeared as areas of increased reflectivity, and distinguished from non-carious staining at the base of occlusal fissures or developmental defects on cusps. This preliminary work presented proof for practicability of combining NIR imaging technology with SFE for reliable and noninvasive dental imaging with miniaturization and low cost.

Paper Details

Date Published: 9 February 2018
PDF: 9 pages
Proc. SPIE 10473, Lasers in Dentistry XXIV, 1047308 (9 February 2018); doi: 10.1117/12.2295080
Show Author Affiliations
Yaxuan Zhou, Univ. of Washington (United States)
Robert Lee, Univ. of Washington School of Dentistry (United States)
Alireza Sadr, Univ. of Washington School of Dentistry (United States)
Eric J. Seibel, Univ. of Washington (United States)
Univ. of Washington School of Dentistry (United States)


Published in SPIE Proceedings Vol. 10473:
Lasers in Dentistry XXIV
Peter Rechmann; Daniel Fried, Editor(s)

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