title: Transillumination and reflectance probes forin vivonear-IR imaging of dental caries.
abstract: Previous studies have demonstrated the utility of near infrared (NIR) imaging for caries detection employing transillumination and reflectance imaging geometries. Three intra-oral NIR imaging probes were fabricated for the acquisition ofin vivo,real time videos using a high definition InGaAs SWIR camera and near-IR broadband light sources. Two transillumination probes provide occlusal and interproximal images using 1300-nm light where water absorption is low and enamel manifests the highest transparency. A third reflectance probe utilizes cross polarization and operates at >1500-nm, where water absorption is higher which reduces the reflectivity of sound tissues, significantly increasing lesion contrast. These probes are being used in an ongoing clinical study to assess the diagnostic performance of NIR imaging for the detection of caries lesions in teeth scheduled for extraction for orthodontic reasons.
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Jacob C
authors.initials: JC
authors.lastname: Simon
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Seth A
authors.initials: SA
authors.lastname: Lucas
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Michal
authors.initials: M
authors.lastname: Staninec
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Henry
authors.initials: H
authors.lastname: Tom
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Kenneth H
authors.initials: KH
authors.lastname: Chan
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Cynthia L
authors.initials: CL
authors.lastname: Darling
authors.affiliation: University of California, San Francisco, San Francisco, CA 94143-0758.
authors.forename: Daniel
authors.initials: D
authors.lastname: Fried
keywords: Near-IR imaging; caries detection; demineralization; reflectance; transillumination