Thermophotonic lock-in imaging: a novel early caries detection and imaging modality

Nima Tabatabaei; Andreas Mandelis; Bennett T. Amaechi

doi:10.1117/12.878847

17 February 2011 Thermophotonic lock-in imaging: a novel early caries detection and imaging modality

Nima Tabatabaei, Andreas Mandelis, Bennett T. Amaechi

Proceedings Volume 7884, Lasers in Dentistry XVII; 78840A (2011) https://doi.org/10.1117/12.878847
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Using photothermal wave principles and as an extension to the frequency-domain photothermal radiometry, a novel dental imaging modality, thermophotonic lock-in imaging (TPLI), is introduced. In order to assess the capabilities of the proposed methodology samples with natural and artificially-generated caries were examined and the results were compared with the destructive transverse microradiography density profiles. It was found that the increased light scattering and absorption within early carious lesions increases the thermal-wave amplitude and shifts the thermal-wave centroid, producing contrast between the carious lesion and the intact enamel in both amplitude and phase images. Phase images are emissivity normalized and therefore insensitive to the presence of stain. Amplitude images provide integrated information from deeper enamel regions. It was concluded that the results of our non-invasive, non-contacting imaging methodology exhibit significantly higher sensitivity to very early demineralization than dental radiographs and are in agreement with the destructive transverse microradiography mineral density profiles.

Citation Download Citation

Nima Tabatabaei, Andreas Mandelis, and Bennett T. Amaechi "Thermophotonic lock-in imaging: a novel early caries detection and imaging modality", Proc. SPIE 7884, Lasers in Dentistry XVII, 78840A (17 February 2011); https://doi.org/10.1117/12.878847

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available