Optical detection of dental caries

Image analysis – Applications – Biomedical applications

Reexamination Certificate

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C382S132000, C382S254000, C433S029000

Reexamination Certificate

active

07844091

ABSTRACT:
A method for caries detection uses an image capture device (30, 32) to obtain fluorescence image data from the tooth (20) by illuminating the tooth to excite fluorescent emission. A first enhanced image of the tooth is then obtained by illuminating the tooth at a first incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. A second enhanced image of the tooth is then obtained by illuminating the tooth at a second incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. The first and second enhanced images are then analyzed to select and display the best-contrast image. This method provides high contrast images for carious regions (58) on all tooth surfaces.

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Fried et al.; Imaging caries lesions and lesion progression with polarization sensitive optical coherence tomography; Journal of Biomedical Optics,vol. 7, No. 4, Oct. 2002, pp. 618-627.
Buchalla et al.; Optimal Camera and Illumincation Angulations for Detection of Interproximal Caries Using Quantitative Light-Induced Fluorescence; Caries Research 2002, pp. 320-326.

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