Chronic thromboembolic pulmonary hypertension (CTEPH) is a rare but notoriously underdiagnosed complication of pulmonary embolism, which carries a poor prognosis if left untreated. CTEPH results from the obstruction of the pulmonary vascular bed by fibro-thrombotic material, which may completely occlude the lumen. Although massive or recurrent pulmonary embolism is thought to be the initiating ...

The visual system rapidly completes a partially occluded figure. We probed the completion process by using priming in combination with neuroimaging techniques. Priming leads to more efficient visual processing and thus a reduction in neural activity in relevant brain areas. These areas were studied with high spatial resolution and temporal accuracy with focus on early perceptual processing. We ...

since the report from the national high blood pressure (bp) education program working group on bp in children and adolescents and the introduction of a new description called prehypertension many data have been provided on its rate of progression to hypertension, its prevalence and association with other cardiovascular (cv) risk factors and its therapy. making a diagnosis of prehypertension in ...

Detection of partially occluded objects is a challenging computer vision problem. Standard Convolutional Neural Network (CNN) detectors fail if parts of the detection window are occluded, since not every sub-part of the window is discriminative on its own. To address this issue, we propose a novel loss layer for CNNs, named grid loss, which minimizes the error rate on sub-blocks of a convolutio...

PERCEPTUAL COMPLETION OF OCCLUDED SURFACES February 1994 LANCE R. WILLIAMS B.S., Pennsylvania State University M.S., University of Massachusetts Amherst Ph.D., University of Massachusetts Amherst Directed by: Professor Allen R. Hanson Researchers in computer vision have primarily studied the problem of visual reconstruction of environmental structure that is plainly visible. In this thesis, the...

The partially occluded image recognition (POIR) problem has been a challenge for artificial intelligence long time. A common strategy to handle the POIR is using non-occluded features classification. Unfortunately, this will lose effectiveness when severely occluded, since visible parts can only provide limited information. Several studies in neuroscience reveal that feature restoration which f...

BACKGROUND The use of central venous catheters as a source of vascular access in patients undergoing hemodialysis may be complicated by thrombosis. Frequently, thrombolytics are used in an attempt to reestablish blood flow through partially or completely occluded catheters. OBJECTIVE To compare the efficacy of alteplase (recombinant tissue plasminogen activator) versus urokinase in reestablis...

Pulmonary arterial hypertension, pulmonary veno-occlusive disease, and pulmonary capillary hemangiomatosis are included in the same group (group 1) of clinical classification of pulmonary hypertension.1 Histological changes in the small pulmonary arteries (ie, intimal fibrosis and medial hypertrophy) are similar in these 3 diseases, and clinical presentations of the 3 diseases are often indisti...

Submit Manuscript | http://medcraveonline.com A 66 year-old man, with hypertension, non-insulin dependent diabetes mellitus, a prior myocardial infarction (MI) in 1990, and family history for hypertension and nephropathy, was admitted to hospital with non-ST elevation MI (NSTEMI). He had been on hemodialysis (once-a-week) for 3 weeks due to end-stage membranous glomerulonephritis previously tre...

We show that early vision can use monocular cues to rapidly complete partially-occluded objects. Visual search for easily-detected fragments becomes difficult when the completed shape is similar to others in the display; conversely, search for fragments that are difficult to detect becomes easy when the completed shape is distinctive. Results indicate that completion occurs via the occlusion-tr...