Photoacoustic detection of blood in dental pulp by using short-time Fourier transform

Azusa Yamada; Satoko Kakino; Yuji Matsuura

doi:10.1117/12.2210797

15 March 2016 Photoacoustic detection of blood in dental pulp by using short-time Fourier transform

Azusa Yamada, Satoko Kakino, Yuji Matsuura

Proceedings Volume 9708, Photons Plus Ultrasound: Imaging and Sensing 2016; 970833 (2016) https://doi.org/10.1117/12.2210797
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

A method based on photoacoustic analysis is proposed to diagnose dental pulp vitality. Photoacoustic analysis enables to get signal from deeper tissues than other optical analyses and therefore, signal detection from root canal of thick dental tissues such as molar teeth is expected. As a light source for excitation of photoacoustic waves, a microchip Q-switched YAG laser with a wavelength of 1064 nm was used and owing to large penetration depth of the near infrared laser, photoacoustic signals from dental root were successfully obtained. It was found that the photoacoustic signals from the teeth containing hemoglobin solution in the pulp cavity provide vibration in high frequency region. It was also shown that the intensities of the high frequency component have correlation with the hemoglobin concentration of solution. We applied short-time Fourier transform for evaluation of photoacoustic signals and this analysis clearly showed photoacoustic signals from dental root.

Citation Download Citation

Azusa Yamada, Satoko Kakino, and Yuji Matsuura "Photoacoustic detection of blood in dental pulp by using short-time Fourier transform", Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 970833 (15 March 2016); https://doi.org/10.1117/12.2210797

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