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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 6 — Mar. 19, 2007
  • pp: 3291–3300

Reflection mode photoacoustic measurement of speed of sound

Roy G. M. Kolkman, Wiendelt Steenbergen, and Ton G. van Leeuwen  »View Author Affiliations

Optics Express, Vol. 15, Issue 6, pp. 3291-3300 (2007)

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We present a method to determine the speed of sound in tissue using a double-ring photoacoustic sensor working in reflection mode. This method uses the cross-correlation between the laser-induced ultrasound waves detected by two concentric ring shaped sensors, while a priori information about the depth-position of the photoacoustic source is not required. We demonstrate the concept by estimating the speed of sound in water as a function of temperature. Comparison of the estimated speed with values reported in literature shows an average systematic error of 0.1% and a standard deviation of 0.1%. Furthermore, we demonstrate that the method can be applied to layered media. The method has application in the correction of photoacoustic and ultrasound images afflicted by local speed variations in tissue. Additionally, the concept shows promise in monitoring temperature changes which are reflected in speed of sound changes in tissue.

© 2007 Optical Society of America

OCIS Codes
(170.0110) Medical optics and biotechnology : Imaging systems
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(170.5120) Medical optics and biotechnology : Photoacoustic imaging
(300.1030) Spectroscopy : Absorption

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: November 21, 2006
Revised Manuscript: January 12, 2007
Manuscript Accepted: January 12, 2007
Published: March 19, 2007

Virtual Issues
Vol. 2, Iss. 4 Virtual Journal for Biomedical Optics

Roy G. Kolkman, Wiendelt Steenbergen, and Ton G. van Leeuwen, "Reflection mode photoacoustic measurement of speed of sound," Opt. Express 15, 3291-3300 (2007)

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