Effect of surface boundary on time-resolved reflectance. Measurements with a prototype endoscopic catheter

Steven L. Jacques, Stephen T. Flock

Research output: Contribution to journalConference article

5 Scopus citations

Abstract

This paper presents initial studies on a prototype catheter device suitable for the biopsy channel of an endoscope. A pair of optical fibers, one a source and one a collector, were adjoined with epoxy to create a single catheter tip. Such close proximity of two fibers is a special case of the generic R(r,t) measurement, where the fiber separation (r) approaches zero. The influence of an air/tissue surface boundary on the time-resolved collection of photons backscattered by a turbid media is presented. The catheter was either (1) placed on the surface of an aqueous turbid solution, or (2) imbedded deep within the volume and distant from the surface or any boundaries. The time course of photon collection was found to be strongly influenced by the surface boundary. Such boundary effects are pertinent to the design of time-resolved catheters which require close spacing of the source and collector fibers.

Original languageEnglish (US)
Pages (from-to)12-20
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1431
StatePublished - Jan 1 1991
Externally publishedYes
EventProceedings of Time-Resolved Spectroscopy and Imaging of Tissues - Los Angeles, CA, USA
Duration: Jan 23 1991Jan 24 1991

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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