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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 6 — May. 26, 2009

Broadband frequency-domain near-infrared spectral tomography using a mode-locked Ti:sapphire laser

Jia Wang, Shudong Jiang, Keith D. Paulsen, and Brian W. Pogue  »View Author Affiliations


Applied Optics, Vol. 48, Issue 10, pp. D198-D207 (2009)
http://dx.doi.org/10.1364/AO.48.00D198


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Abstract

Frequency-domain near-infrared (NIR) diffuse spectral tomography with a mode-locked Ti:sapphire laser is presented, providing tunable multiwavelength quantitative spectroscopy with maximal power for thick tissue imaging. The system was developed to show that intrinsically high stability can be achieved with many wavelengths in the NIR range, using a mode-locked signal of 80 ‚ÄČ MHz with heterodyned lock-in detection. The effect of cumulative noise from multiple wavelengths of data on the reconstruction process was studied, and it was shown that inclusion of more wavelengths can reduce skew in the noise distribution. This normalization of the data variance then minimizes errors in estimation of chromophore concentrations. Simulations and tissue phantom experiments were used to quantify this improvement in image accuracy for recovery of tissue hemoglobin and oxygen saturation.

© 2009 Optical Society of America

OCIS Codes
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.6510) Medical optics and biotechnology : Spectroscopy, tissue diagnostics
(300.6360) Spectroscopy : Spectroscopy, laser

History
Original Manuscript: September 8, 2008
Revised Manuscript: January 16, 2009
Manuscript Accepted: January 30, 2009
Published: March 2, 2009

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

Citation
Jia Wang, Shudong Jiang, Keith D. Paulsen, and Brian W. Pogue, "Broadband frequency-domain near-infrared spectral tomography using a mode-locked Ti:sapphire laser," Appl. Opt. 48, D198-D207 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-48-10-D198

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