Computer-aided retinal photocoagulation system

Barrett, Steven F.; Wright, Cameron H. G.; Jerath, Maya R.; Lewis, R. S.; Dillard, Bryan C.; Rylander, H. G.; Welch, Ashley J.

doi:10.1117/12.227101

Cited by 13 publications

(9 citation statements)

References 27 publications

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“…They are using the reflectance from a forming therapeutic lesion as a visible marker of immeasurable lesion depth. They are also working on a seamless, clinically significant prototype to safely and quickly place therapeutic retinal lesions for the treatment of various disorders [65][66][67][68][69].…”

Section: Automated Retinal Lesion Placementmentioning

confidence: 99%

Laser Ophthalmology

Barrett¹,

Wright²,

Welch³

2002

Medical Applications of Lasers

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Lasers have been employed in ophthalmology since their inception over four decades ago. In this chapter we will investigate many of these exciting applications. The chapter begins with a brief review of the characteristics of the human eye including eye anatomy and movements, visual refractive errors, and fixation capability. We will then briefly review laser interaction with eye tissue followed by a detailed look at therapeutic and diagnostic applications of lasers in ophthalmology. The chapter concludes with new laser technologies now on the horizon. CHARACTERISTICS OF THE HUMAN EYEIn this section we will investigate the anatomy and characteristics of the human eye pertinent to laser applications. We will begin with a review of the gross anatomy of the eye followed by a detailed look at both the cornea and the retina. We will then discuss eye movements and fixation capability followed by characteristics of the aging eye. Gross Anatomical StructureEyes are the complex sense organs of the visual system. The adult eye is somewhat like a fluid filled globe approximating a spherical shape measuring 24 mm long by 22 mm across [1], as shown in Figure 1

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Section: Automated Retinal Lesion Placementmentioning

confidence: 99%

Laser Ophthalmology

Barrett¹,

Wright²,

Welch³

2002

Medical Applications of Lasers

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“…The tracking system measured retinal movement dynamically and derived laser position update information which thereby provided real-time, motion stabilized lesion placement. 1,5,[8][9][10] This system was adapted to assist the Optical Radiation Branch at Brooks AFB, TX, in establishing safe viewing eye standards for lasers.…”

Section: Application 1: Retinal Photocoagulation Systemmentioning

confidence: 99%

Efficiently tracking a moving object in two-dimensional image space

Barrett

Wright

Zwick

et al. 2001

J. Electron. Imaging

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A tracking algorithm has been developed to efficiently track a moving object in two-dimensional image space. The algorithm employs a limited exhaustive template matching scheme that combines the accuracy of an exhaustive search with the computational efficiency of a coarse-fine template matching scheme. The overall result is an accurate, time-efficient tracking algorithm. After providing a theoretical discussion of the algorithm, three separate biomedical applications of the algorithm are described: (1) stabilizing an irradiating laser on the retinal surface for photocoagulation treatment, (2) measuring target fixation eye movement to construct pattern densities at the retina, and (3) tracking a rat swimming in a Morris Water Maze for psychophysiological studies. Results for each application is provided. The paper concludes with a discussion of the relative merits of the tracking algorithm and recommendations for methods to improve the performance of the algorithm. © 2001 SPIE and IS&T.

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“…A detailed description of this digital tracking technique, which uses blood vessel templates, has been discussed. 1,10 For the purpose of this discussion, we need only summarize the advantages and disadvantages of this form of retinal tracking. Disadvantage.…”

Section: Digital Trackingmentioning

confidence: 99%

“…A computer-assisted system known as CALOSOS ͑computer aided laser optical system for ophthalmic surgery͒ is being developed that will rapidly and safely place multiple therapeutic lesions of consistent size at desired locations on the retina in a matter of seconds with little or no human intervention. Previous work related to the development of CALOSOS has been published; [1][2][3] this paper discusses initial in vivo results using the system.…”

Section: Introductionmentioning

confidence: 99%

Initial in vivo results of a hybrid retinal photocoagulation system

et al. 2000

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We describe initial in vivo experimental results of a new hybrid digital and analog design for retinal tracking and laser beam control. An overview of the design is given. The results show in vivo tracking rates which exceed the equivalent of 38 degrees/s in the eye. A robotically assisted lesion pattern is created for laser surgery to treat conditions such as diabetic retinopathy and retinal breaks.

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Computer-aided retinal photocoagulation system

Cited by 13 publications

References 27 publications

Laser Ophthalmology

Laser Ophthalmology

Efficiently tracking a moving object in two-dimensional image space

Initial in vivo results of a hybrid retinal photocoagulation system

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