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Proceedings Paper

Irradiation control parameters for computer-assisted laser photocoagulation of the retina
Author(s): Espen Naess; Torstein Molvik; Steven F. Barrett; 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 global, digital-based tracking subsystem; a fast, local analog tracking subsystem; and a confocal reflectance subsystem to control lesion parameters dynamically. We have reported on these subsystems in previous SPIE presentations. This paper concentrates on the development of the 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 and using measurable lesion reflectance growth parameters to develop a noninvasive method to infer lesion depth. This method will allow dynamic control of laser dosimetry to provide similar lesions across the non-uniform retinal surface. These system improvements and progress toward a clinically significant system are covered in detail within this paper.

Paper Details

Date Published: 7 June 2001
PDF: 12 pages
Proc. SPIE 4245, Ophthalmic Technologies XI, (7 June 2001); doi: 10.1117/12.429283
Show Author Affiliations
Espen Naess, Univ. of Wyoming (United States)
Torstein Molvik, Univ. of Wyoming (United States)
Steven F. Barrett, 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)


Published in SPIE Proceedings Vol. 4245:
Ophthalmic Technologies XI
Fabrice Manns; Per G. Soederberg; Arthur Ho, Editor(s)

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