Hybrid digital/analog retinal-tracking system

Steven F. Barrett; Peter W. de Graaf; Cameron H. G. Wright

doi:10.1117/12.384897

3 May 2000 Hybrid digital/analog retinal-tracking system

Steven F. Barrett, Peter W. de Graaf, Cameron H. G. Wright

Proceedings Volume 3911, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems II; (2000) https://doi.org/10.1117/12.384897
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

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 in previous SPIE presentations. This paper concentrates on the development of the confocal reflectance subsystem and its integration into the overall photocoagulation system. Specifically, our goal was to use measurable lesion reflectance growth curve 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.

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Steven F. Barrett, Peter W. de Graaf, and Cameron H. G. Wright "Hybrid digital/analog retinal-tracking system", Proc. SPIE 3911, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems II, (3 May 2000); https://doi.org/10.1117/12.384897

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KEYWORDS

Reflectivity

Retina

Laser coagulation

Reflectometry

Confocal microscopy

Analog electronics

Laser energy

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