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Journal of Biomedical Optics

Computer-assisted laser photocoagulation of the retina: a hybrid tracking approach
Author(s): Espen Naess; Torstein Molvik; Dustin Adam Ludwig; Steven F. Barrett; Stanislaw F. Legowski; Cameron H. G. Wright; Peter W. de Graaf
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Paper Abstract

A system for robotically assisted retinal surgery has been developed to rapidly and safely place lesions on the retina for photocoagulation therapy. This system provides real-time, motion stabilized lesion placement for typical irradiation times of 100 ms. The system consists of three main subsystems: a digital-based global tracking subsystem; a fast, analog local tracking subsystem; and a confocal reflectance subsystem to control lesion parameters dynamically. We have reported previously on these individual subsystems. This paper concentrates on the development of a second hybrid system prototype. Considerable progress has been made toward reducing the footprint of the optical system, simplifying the user interface, fully characterizing the analog tracking system, using measurable lesion reflectance parameters to develop a noninvasive method to infer lesion depth, and integrating the subsystems into a seamless hybrid system. These system improvements and progress toward a clinically significant system are covered in detail within this paper. The tracking algorithms and concepts developed for this project have considerable potential for application in many other areas of biomedical engineering.

Paper Details

Date Published: 1 April 2002
PDF: 11 pages
J. Biomed. Opt. 7(2) doi: 10.1117/1.1461831
Published in: Journal of Biomedical Optics Volume 7, Issue 2
Show Author Affiliations
Espen Naess, Univ. of Wyoming (United States)
Torstein Molvik, Univ. of Wyoming (United States)
Dustin Adam Ludwig, Univ. of Wyoming (United States)
Steven F. Barrett, Univ. of Wyoming (United States)
Stanislaw F. Legowski, Univ. of Wyoming (United States)
Cameron H. G. Wright, U.S. Air Force Academy (United States)
Peter W. de Graaf, U.S. Air Force Academy (United States)

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