RETINAL IMAGING - SCATTER AND INDIRECT ILLUMINATION

视网膜成像 - 散射和间接照明

• 批准号: 3260847
• 负责人: Robert H Webb
• 金额: $ 22万
• 依托单位: SCHEPENS EYE RESEARCH INSTITUTE
• 依托单位国家: 美国
• 财政年份: 1984
• 资助国家: 美国
• 起止时间: 1984-12-01 至 1987-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3260847
• 关键词: clinical biomedical equipment; eye fundus photography; human subject; lasers; light scattering; ophthalmoscopy; retina disorder

This is a project to study the ways in which light directed at the retina aids or hinders the visualization of features in the eye. A narrow beam of light focussed on the retina is scattered back out of the eye from a) its focal spot at the retina, b) scatterers in the lens and vitreous and c) retinal or anterior structures which have been indirectly lit by light scattered out of the focal spot. The Scanning Laser Ophthalmoscope provides such ideally analysable light. Implementation of a technique of 'double scanning' used in underwater exploration will allow the separation of the three types of optical signal. In this study we will look at them individually: Type a) by itself provides a 'direct' image of the fundus, free of veiling from anterior scatterers and scatter within the retina. Type b) provides information on the anterior scatterers themselves - what they are and how they are organized. Type c) represents an indirectly illuminated image of the fundus. This complete picture is like a mosaic of all the views seen at the edges of the illuminated area in slit lamp and ophthalmoscopic observation.

这是一个研究光线照射视网膜的方式的项目 有助于或阻碍眼睛中特征的可视化。 一束狭窄的 聚焦在视网膜上的光从a）其 视网膜上的焦点，B）透镜和玻璃体中的散射体，以及c） 间接被光线照亮的视网膜或前部结构 从焦点上散开。 扫描激光检眼镜 提供这种理想的可分析光。 实施一种技术， 在水下探测中使用的“双重扫描”将允许分离 三种类型的光信号。 在本研究中，我们将研究 个别地： 类型a）本身提供了一个'直接'的图像眼底，无面纱 来自前散射体并在视网膜内散射。 类型B）提供了关于前散射体本身的信息-什么 它们是什么以及它们是如何组织的。 类型c）表示眼底的间接照明图像。 这 完整的图片就像在边缘看到的所有视图的马赛克 裂隙灯照明区和检眼镜观察。