Much of our basic knowledge of retinal blood flow regulation is based on data obtained from animal experiments through the use of invasive techniques. However, during the last decades, major developments in the field of optics and lasers have led to a variety of noninvasive techniques, which have been applied to the human eye for the investigation of retinal hemodynamics, and more specifically ...

THE eye is the only part of the body in which blood vessels can readily be observed. In disease, retinal blood vessels may show pathological variations in calibre, the severity of which at times reflects the progress of the disease, whether local as in retinitis pigmentosa, or systemic as in spastic hypertension. Spasticity of retinal vessels may show measurable alteration after treatment, in p...

3D modelling has gained lot of importance in the field of medical Image analysis. 3D models give the depth information of the object which is very useful in visualization. The analysis of the blood vessels in the retinal image is helpful for identifying the different diseases such as stages of diabetic retinopathy, glaucoma etc.3D retinal blood vessels would be helpful in explaining to patients...

Diabetes is a metabolic disease characterized by elevated blood glucose level due to impaired insulin secretion and activity. Chronic hyperglycemia leads to functional disorders of numerous organs and to their damage. Vascular lesions belong to the most common late complications of diabetes. Microangiopathic lesions can be found in the eyeball, kidneys and nervous system. Macroangiopathy is ass...

A novel topological segmentation of retinal images represents blood vessels as connected regions in the continuous image plane, having shape-related analytic and geometric properties. This paper presents topological segmentation results from the DRIVE retinal image database [SAN∗04].

Research Work: This Article focuses the perspective of retinal blood vessel classification and detection in digitized retinal images. The color-based channels like green and red channels extraction processes lead to the enhanced identification of retinal blood vessel through the performance measures using Receiver Operating Characteristics (ROC). Processes with Methodologies: This proposed syst...

Retinal Blood vessel morphology can be an important indicator for many diseases such as diabetes mellitus, hypertension and arteriosclerosis. The measurement of geometrical changes in retinal veins and arteries can be applied to a variety of clinical studies. The spotlight of this paper is developing the screening system with the aim of highly accurate and automated analysing tool for the ophth...

Segmentation of retinal blood vessels is significant to diagnosis and evaluation of ocular diseases like glaucoma and systemic diseases such as diabetes and hypertension. The retinal blood vessel segmentation for small and low contrast vessels is still a challenging problem. To solve this problem, a new method based on cake filter is proposed. Firstly, a quadrature filter band called cake filte...

Vascular endothelial growth factor (VEGF)-A is a well-known major chemoattractant driver of angiogenesis--the formation of new blood vessels from pre-existing ones. However, the repellent factors that fine-tune this angiogenic process remain poorly characterized. We investigated the expression and functional role of endothelial cell-derived semaphorin 3A (Sema3A) in retinal angiogenesis, using ...

Chein-I Chang, MEMBER SPIE University of Maryland—Baltimore County Department of Computer Science and Electrical Engineering Baltimore, Maryland 21250 E-mail: [email protected] Abstract. The detection of venous beading in retinal images provides an early sign of diabetic retinopathy and plays an important role as a preprocessing step in diagnosing ocular diseases. We present a computer-aided diag...