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

Azusa Yamada, Satoko Kakino, Yuji Matsuura

研究成果: Conference contribution


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.

ホスト出版物のタイトルPhotons Plus Ultrasound
ホスト出版物のサブタイトルImaging and Sensing 2016
編集者Alexander A. Oraevsky, Lihong V. Wang
出版ステータスPublished - 2016 1 1
イベントPhotons Plus Ultrasound: Imaging and Sensing 2016 - San Francisco, United States
継続期間: 2016 2 142016 2 17


名前Progress in Biomedical Optics and Imaging - Proceedings of SPIE


OtherPhotons Plus Ultrasound: Imaging and Sensing 2016
CountryUnited States
CitySan Francisco

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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