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Photoacoustic microscopy of human teeth

Rao, Bin and Cai, Xin and Favazza, Christopher and Yao, Junjie and Li, Li and Duong, Steven and Liaw, Lih-huei and Holtzman, Jennifer and Wilder-Smith, Petra and Wang, Lihong V. (2011) Photoacoustic microscopy of human teeth. In: Lasers in Dentistry XVII. Proceedings of SPIE. No.7884. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 78840U. ISBN 9780819484215. https://resolver.caltech.edu/CaltechAUTHORS:20180925-100003890

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Abstract

Photoacoustic microscopy (PAM) utilizes short laser pulses to deposit energy into light absorbers and sensitively detects the ultrasonic waves the absorbers generate in response. PAM directly renders a three-dimensional spatial distribution of sub-surface optical absorbers. Unlike other optical imaging technologies, PAM features label-free optical absorption contrast and excellent imaging depths. Standard dental imaging instruments are limited to X-ray and CCD cameras. Subsurface optical dental imaging is difficult due to the highly-scattering enamel and dentin tissue. Thus, very few imaging methods can detect dental decay or diagnose dental pulp, which is the innermost part of the tooth, containing the nerves, blood vessels, and other cells. Here, we conducted a feasibility study on imaging dental decay and dental pulp with PAM. Our results showed that PAM is sensitive to the color change associated with dental decay. Although the relative PA signal distribution may be affected by surface contours and subsurface reflections from deeper dental tissue, monitoring changes in the PA signals (at the same site) over time is necessary to identify the progress of dental decay. Our results also showed that deep-imaging, near-infrared (NIR) PAM can sensitively image blood in the dental pulp of an in vitro tooth. In conclusion, PAM is a promising tool for imaging both dental decay and dental pulp.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.874070DOIArticle
ORCID:
AuthorORCID
Rao, Bin0000-0001-6494-3110
Wang, Lihong V.0000-0001-9783-4383
Additional Information:© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:7884
Record Number:CaltechAUTHORS:20180925-100003890
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180925-100003890
Official Citation:Bin Rao, Bin Rao, Xin Cai, Xin Cai, Christopher Favazza, Christopher Favazza, Junjie Yao, Junjie Yao, Li Li, Li Li, Steven Duong, Steven Duong, Lih-Huei Liaw, Lih-Huei Liaw, Jennifer Holtzman, Jennifer Holtzman, Petra Wilder-Smith, Petra Wilder-Smith, Lihong V. Wang, Lihong V. Wang, } "Photoacoustic microscopy of human teeth", Proc. SPIE 7884, Lasers in Dentistry XVII, 78840U (17 February 2011); doi: 10.1117/12.874070; https://doi.org/10.1117/12.874070
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89910
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Sep 2018 21:47
Last Modified:03 Oct 2019 20:20

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