PURPOSE To determine whether color Doppler flow imaging with the use of slow-flow sensitivity improves sensitivity and specificity in the differentiation of occlusion and near occlusion of the internal carotid artery. METHODS Color Doppler and duplex sonography were performed in symptomatic patients who had angiographically confirmed occlusion and/or near occlusion of the internal carotid art...

BACKGROUND The purpose of this study is to illustrate the fundus autofluorescence and high-definition optical coherence tomography (HD-OCT) features of acute and long-standing retinal artery occlusions. DESIGN Retrospective case series. PARTICIPANTS Patients with acute and chronic retinal and cilioretinal artery occlusions are included in this series. METHODS A detailed clinical examinati...

This work presents a novel people tracking approach, able to cope with frequent shape changes and large occlusions. In particular, the tracks are described by means of probabilistic masks and appearance models. Occlusions due to other tracks, or due to background objects and false occlusions are discriminated. The classification is exploited in a selective model update. The tracking system is g...

In this paper we propose a method for variational segmentation and contour matching of non-rigid objects in image sequences which can deal with the occlusions. The method is based on a region-based active contour model of the Chan-Vese, augmented with a frame-to-frame interaction term which uses the segmentation result from the previous frame as a shape prior. This method has given good results...

Purpose To report a novel finding in a case of idiopathic recurrent branch retinal arterial occlusions. Observations We report our findings in a 31-year-old woman with an idiopathic recurrent branch retinal arterial occlusions (BRAOs) who was followed in our clinic for 16 years. Repeated fluorescein angiographies were performed to evaluate the idiopathic recurrent BRAOs. The findings showed m...

Occlusion of the internal carotid or middle cerebral artery was seen in 44 young adults of both sexes from a rural population in Ceylon over a period of four years. None had hypertension, diabetes, prediabetes, or hypercholesterolaemia. There were 19 men with internal carotid occlusions, most being due to atherosclerotic thrombosis. The high incidence of atherosclerosis in these patients on a m...

Ophthalmologic complications of nonocular surgeries are rare events, but can lead to irreversible conditions low visual acuity. They often associated with spine, heart and neck surgery, however they occur after procedures on other systems. The main local causes ischemic optic neuropathies, vascular occlusions, cortical lesions, acute angle-closure glaucoma. We report two cases sudden acuity sec...

By exclusion then, it seems that the main cause of brain infarcts may be sudden vascular occlusion and not stenosis. Most of the occlusions may be caused by thromboemboli, as suggested previously." However, it should be noted that some of the occlusions may be caused primarily by rupture of atherosclerotic plaques, which are easily overlooked when secondary thrombosis has occurred. Furthermore,...