Use of osmotically active agents to alter optical properties of tissue: Influence on the detected fluorescence signal from a subsurface target

Gracie Vargas, Kin F. Chan, Sharon L. Thomsen, Ashley J. Welch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we used a technique that alters the optical properties of tissue to study the effects of tissue scattering on the detected fluorescence from a target placed under the tissue sample. By using hyper-osmotic solutions of glycerol or dimethyl sulfoxide, scattering in tissue samples was reduced substantially. A fluorescent film was placed underneath in vitro and in vivo samples of hamster skin. Excitation of the fluorescent film was achieved through the tissue and the fluorescent signal from the film monitored over time as an osmotically active agent was added to the tissue. The film had an absorption peak at 542 nm and an emission peak at 585 nm. The reduction in tissue scattering caused by the optical clearing agents led to an increase in the detected fluorescent signal (up to double the original signal). The increase was greater for 14 M dimethyl sulfoxide than for 13 M glycerol, and greater for in vivo skin than for in vitro skin. The study serves as a demonstration of the benefits of optical tissue clearing by osmotically active agents to the detected signal in an optical application. Temporary reduction of scattering in tissue will be useful in therapeutic and diagnostic applications that can benefit from an increase in the penetration depth of light.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages98-103
Number of pages6
Volume3907
StatePublished - 2000
Externally publishedYes
EventLasers in Surgery: Advanced Characterization, Therapeutics, and Systems X - San Jose, CA, USA
Duration: Jan 22 2000Jan 25 2000

Other

OtherLasers in Surgery: Advanced Characterization, Therapeutics, and Systems X
CitySan Jose, CA, USA
Period1/22/001/25/00

Fingerprint

Optical properties
Fluorescence
Tissue
optical properties
fluorescence
Scattering
Skin
clearing
Dimethyl sulfoxide
glycerols
Glycerol
scattering
hamsters
Demonstrations
penetration
excitation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Vargas, G., Chan, K. F., Thomsen, S. L., & Welch, A. J. (2000). Use of osmotically active agents to alter optical properties of tissue: Influence on the detected fluorescence signal from a subsurface target. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3907, pp. 98-103). Society of Photo-Optical Instrumentation Engineers.

Use of osmotically active agents to alter optical properties of tissue : Influence on the detected fluorescence signal from a subsurface target. / Vargas, Gracie; Chan, Kin F.; Thomsen, Sharon L.; Welch, Ashley J.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3907 Society of Photo-Optical Instrumentation Engineers, 2000. p. 98-103.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Vargas, G, Chan, KF, Thomsen, SL & Welch, AJ 2000, Use of osmotically active agents to alter optical properties of tissue: Influence on the detected fluorescence signal from a subsurface target. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3907, Society of Photo-Optical Instrumentation Engineers, pp. 98-103, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems X, San Jose, CA, USA, 1/22/00.
Vargas G, Chan KF, Thomsen SL, Welch AJ. Use of osmotically active agents to alter optical properties of tissue: Influence on the detected fluorescence signal from a subsurface target. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3907. Society of Photo-Optical Instrumentation Engineers. 2000. p. 98-103
Vargas, Gracie ; Chan, Kin F. ; Thomsen, Sharon L. ; Welch, Ashley J. / Use of osmotically active agents to alter optical properties of tissue : Influence on the detected fluorescence signal from a subsurface target. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3907 Society of Photo-Optical Instrumentation Engineers, 2000. pp. 98-103
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