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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 9 — Apr. 27, 2009
  • pp: 7688–7693

Noninvasive label-free imaging of microhemodynamics by optical-resolution photoacoustic microscopy

Song Hu, Konstantin Maslov, and Lihong V. Wang  »View Author Affiliations


Optics Express, Vol. 17, Issue 9, pp. 7688-7693 (2009)
http://dx.doi.org/10.1364/OE.17.007688


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Abstract

In vivo microcirculatory imaging facilitates the fundamental understanding of many major diseases. However, existing techniques generally require invasive procedures or exogenous contrast agents, which perturb the intrinsic physiology of the microcirculation. Here, we report on optical-resolution photoacoustic microscopy (OR-PAM) for noninvasive label-free microcirculatory imaging at cellular levels. For the first time, OR-PAM demonstrates quantification of hemoglobin concentration and oxygenation in single microvessels down to capillaries. Using this technique, we imaged several important yet elusive microhemodynamic activities—including vasomotion and vasodilation—in small animals in vivo. OR-PAM enables functional volumetric imaging of the intact microcirculation, thereby providing greatly improved accuracy and versatility for broad biological and clinical applications.

© 2009 Optical Society of America

OCIS Codes
(110.5120) Imaging systems : Photoacoustic imaging
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(180.5810) Microscopy : Scanning microscopy
(170.2655) Medical optics and biotechnology : Functional monitoring and imaging

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: February 26, 2009
Revised Manuscript: March 26, 2009
Manuscript Accepted: March 30, 2009
Published: April 24, 2009

Virtual Issues
Vol. 4, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Song Hu, Konstantin Maslov, and Lihong V. Wang, "Noninvasive label-free imaging of microhemodynamics by optical-resolution photoacoustic microscopy," Opt. Express 17, 7688-7693 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-9-7688


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