نتایج جستجو برای: fluorescent reflectance imaging
تعداد نتایج: 549729 فیلتر نتایج به سال:
PURPOSE Glaucoma damages the retinal never fiber layer (RNFL). RNFL thickness, measured with optical coherence tomography (OCT), is often used in clinical assessment of the damage. In this study the relation between the RNFL reflectance and thickness at early stages of glaucoma was investigated. METHODS A rat model of glaucoma was used that involved laser photocoagulation of the trabecular me...
it is well known that human facial skin has complex reflectance properties that are difficult to model, render, and edit. We built two measurement devices to analyze and reconstruct the reflectance properties of facial skin. One device is a dome-structured face scanning system equipped with 16 cameras and 150 point light sources that is used to acquire BRDF samples of a face. The other device i...
Total internal reflectance fluorescence (TIRF) microscopy is a technique that allows the study of events happening at the cell membrane, by selective imaging of fluorescent molecules that are closest to a high refractive index substance such as glass. In this article, we apply this technique to image exocytosis of synaptic vesicles in retinal bipolar cells isolated from the goldfish retina. The...
The complex nature of atherosclerosis demands high-resolution approaches to identify subtle thrombogenic lesions and define the risk of plaque rupture. Here, we report the proof-of-concept use of a multimodal scanning fiber endoscope (SFE) consisting of a single optical fiber scanned by a piezoelectric drive that illuminates tissue with red, blue, and green laser beams, and digitally reconstruc...
In this paper we present a method that, given the tristimulus values under a known illuminant, make it possible to compute a reflectance function that is in the range between 0 and 1 of physically admissible values without altering the corresponding tristimulus values. We represent the unknown reflectance function with a three-dimensional linear model. 1. INTRODUCTION A common problem in spectr...
Computer vision and reflectance-based analyses are becoming increasingly important methods to quantify and characterize phenotypic responses by whole organisms to environmental factors. Here, we present the first study of how a non-destructive and completely non-invasive method, body reflectance profiling, can be used to detect and time stress responses in adult beetles. Based on high-resolutio...
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