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Proceedings Paper

Laser scanning endoscope for diagnostic medicine
Author(s): Donald R. Ouimette; Sol Nudelman; Thomas Spackman; Scott Zaccheo
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Paper Abstract

A new type of endoscope is being developed which utilizes an optical raster scanning system for imaging through an endoscope. The optical raster scanner utilizes a high speed, multifaceted, rotating polygon mirror system for horizontal deflection, and a slower speed galvanometer driven mirror as the vertical deflection system. When used in combination, the optical raster scanner traces out a raster similar to an electron beam raster used in television systems. This flying spot of light can then be detected by various types of photosensitive detectors to generate a video image of the surface or scene being illuminated by the scanning beam. The optical raster scanner has been coupled to an endoscope. The raster is projected down the endoscope, thereby illuminating the object to be imaged at the distal end of the endoscope. Elemental photodetectors are placed at the distal or proximal end of the endoscope to detect the reflected illumination from the flying spot of light. This time sequenced signal is captured by an image processor for display and processing. This technique offers the possibility for very small diameter endoscopes since illumination channel requirements are eliminated. Using various lasers, very specific spectral selectivity can be achieved to optimum contrast of specific lesions of interest. Using several laser lines, or a white light source, with detectors of specific spectral response, multiple spectrally selected images can be acquired simultaneously. The potential for co-linear therapy delivery while imaging is also possible.

Paper Details

Date Published: 1 July 1990
PDF: 10 pages
Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990); doi: 10.1117/12.18789
Show Author Affiliations
Donald R. Ouimette, Univ. of Connecticut Health Ctr. (United States)
Sol Nudelman, Univ. of Connecticut Health Ctr. (United States)
Thomas Spackman, Univ. of Connecticut Health Ctr. (United States)
Scott Zaccheo, Univ. of Connecticut Health Ctr. (United States)

Published in SPIE Proceedings Vol. 1231:
Medical Imaging IV: Image Formation
Roger H. Schneider, Editor(s)

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