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Lasers in Dental Science

, Volume 3, Issue 3, pp 155–167 | Cite as

Hyperspectral imaging system associated with novel subtracting image processing algorithm for dental caries early detection

  • Yasser H. El-Sharkawy
  • Sherif ElbasuneyEmail author
Original Article
  • 14 Downloads

Abstract

Objective

Early detection of caries is vital for demineralization reverse offering a less pain, as well as accurate and precise caries removal.

Materials and Methods

In this study, the difference in optical properties of normal tissue and human caries lesion has been used for early diagnosis, using laser induced fluorescence spectroscopy. The human tooth sample was illuminated with visible band sources (488, 514 and 633 nm) with power 5 mW. The reflected and emitted light of tested sample was collected using hyperspectral camera in an attempt to generate multispectral images (cubic image). The variation of reflected and emitted power as function in wavelength was employed to generate characteristic spectrum of each tooth tissue. Human teeth caries tissue lesion releases its excess power by emitting fluorescence light producing chemical footprint signature; this signature is dependent on the elemental composition of tooth elements and caries state.

Results

This non-invasive, non-contact and non-ionizing imaging system with associated novel pattern recognition algorithm was employed to diagnose and classify dental (enamel and dentin), caries, and white spot lesion. It was reported that the perceived fluorescence emission is function of the illuminating wavelength. While enamel and dentin caries were distinguished and characterized at 633 nm illuminating wavelength; white spot lesion cannot be detected. The enamel caries, dentin caries, and white spot lesion were contoured and recognized at 488 nm and 514 nm wavelengths. Therefore full recognition was achieved through generated cubic image after sample irradiation at 488 nm and 514 nm.

Conclusions

This non-invasive, non-contact, and non-ionizing imaging technique with customized image processing algorithm offered high sensitivity, high resolution, and early caries detection with optimum performance at 514 nm.

Keywords

Caries detection Hyperspectral imaging Laser-induced fluorescence Optical imaging 

Notes

Funding information

Military Technical College, Cairo, Egypt, is acknowledged for funding the research project “New prospective for dental tooth caries detection”.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Head of Department of Biomedical EngineeringMilitary Technical CollageCairoEgypt
  2. 2.Head of Nanotechnology CenterMilitary Technical CollegeCairoEgypt

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