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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 1 — Jan. 1, 1997
  • pp: 116–124

Experimental verification of a theory for the time-resolved fluorescence spectroscopy of thick tissues

Albert E. Cerussi, John S. Maier, Sergio Fantini, Maria Angela Franceschini, William W. Mantulin, and Enrico Gratton  »View Author Affiliations


Applied Optics, Vol. 36, Issue 1, pp. 116-124 (1997)
http://dx.doi.org/10.1364/AO.36.000116


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Abstract

Fluorescence spectroscopy provides potential contrast enhancement for near-infrared tissue imaging and physiologically correlated spectroscopy. We present a fluorescence photon migration model and test its quantitative predictive capabilities with a frequency-domain measurement that involves a homogeneous multiple-scattering tissue phantom (with optical properties similar to those of tissue in the near infrared) that contains a fluorophore (rhodamine B). After demonstrating the validity of the model, we explore its ability to recover the fluorophore’s spectral properties from within the multiple-scattering medium. The absolute quantum yield and the lifetime of the fluorophore are measured to within a few percent of the values measured independently in the absence of scattering. Both measurements are accomplished without the use of reference fluorophores. In addition, the model accurately predicts the fluorescence emission spectrum in the scattering medium. Implications of these absolute measurements of lifetime, quantum yield, concentration, and emission spectrum from within multiple-scattering media are discussed.

© 1997 Optical Society of America

History
Original Manuscript: April 16, 1996
Revised Manuscript: July 29, 1996
Published: January 1, 1997

Citation
Albert E. Cerussi, John S. Maier, Sergio Fantini, Maria Angela Franceschini, William W. Mantulin, and Enrico Gratton, "Experimental verification of a theory for the time-resolved fluorescence spectroscopy of thick tissues," Appl. Opt. 36, 116-124 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-1-116

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