Photoacoustic imaging of hidden dental caries by using a bundle of hollow optical fibers

Takuya Koyama; Satoko Kakino; Yuji Matsuura

doi:10.1117/12.2286422

13 February 2018 Photoacoustic imaging of hidden dental caries by using a bundle of hollow optical fibers

Takuya Koyama, Satoko Kakino, Yuji Matsuura

Proceedings Volume 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII; 104880Y (2018) https://doi.org/10.1117/12.2286422
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

Photoacoustic imaging system using a bundle of hollow-optical fibers to detect hidden dental caries is proposed. Firstly, we fabricated a hidden caries model with a brown pigment simulating a common color of caries lesion. It was found that high frequency ultrasonic waves are generated from hidden carious part when radiating Nd:YAG laser light with a 532 nm wavelength to occlusal surface of model tooth. We calculated by Fourier transform and found that the waveform from the carious part provides frequency components of approximately from 0.5 to 1.2 MHz. Then a photoacoustic imaging system using a bundle of hollow optical fiber was fabricated for clinical applications. From intensity map of frequency components in 0.5-1.2 MHz, photoacoustic images of hidden caries in the simulated samples were successfully obtained.

Conference Presentation

Citation Download Citation

Takuya Koyama, Satoko Kakino, and Yuji Matsuura "Photoacoustic imaging of hidden dental caries by using a bundle of hollow optical fibers", Proc. SPIE 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII, 104880Y (13 February 2018); https://doi.org/10.1117/12.2286422

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