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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 22 — Aug. 1, 1999
  • pp: 4930–4938

Measurement of the fluorescence lifetime in scattering media by frequency-domain photon migration

Ralf H. Mayer, Jeffery S. Reynolds, and Eva M. Sevick-Muraca  »View Author Affiliations


Applied Optics, Vol. 38, Issue 22, pp. 4930-4938 (1999)
http://dx.doi.org/10.1364/AO.38.004930


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Abstract

A method is presented to determine fluorescence decay lifetimes within tissuelike scattering media. Fluorescence lifetimes are determined for micromolar concentrations of the dyes 3,3′-Diethylthiatricarbocyanine Iodide and Indocyanine Green by frequency-domain investigations of light propagating in turbid media. Dual-wavelength photon-migration measurements that use intensity-modulated sources at excitation and emission wavelengths of the fluorophores provide optical parameters of the media as well as fluorescence properties of the dyes. The deduction of fluorescence lifetimes requires no calibration with reference fluorophores, and the results are shown to be independent of dye concentration.

© 1999 Optical Society of America

OCIS Codes
(170.3650) Medical optics and biotechnology : Lifetime-based sensing
(170.5280) Medical optics and biotechnology : Photon migration
(170.7050) Medical optics and biotechnology : Turbid media
(260.2510) Physical optics : Fluorescence
(290.4210) Scattering : Multiple scattering
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: December 21, 1998
Revised Manuscript: May 7, 1999
Published: August 1, 1999

Citation
Ralf H. Mayer, Jeffery S. Reynolds, and Eva M. Sevick-Muraca, "Measurement of the fluorescence lifetime in scattering media by frequency-domain photon migration," Appl. Opt. 38, 4930-4938 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-22-4930

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