Sympathetic nervous system (SNS)-mediated peripheral vasoconstriction plays a key role in initial maintenance of blood pressure during rapid-onset asphyxia in the mammalian fetus, but it is attenuated after the first few minutes. It is unclear whether the SNS response is sustained during the brief, but frequently repeated, episodes of asphyxia characteristic of labor. In the present study, 14 f...

With electromagnetic flow transducers and pneumatic cuff occluders on the circumflex branch of the left coronary artery in conscious and in anesthetized dogs, we examined the effects of both a temporary reduction in postocclusion hyperemia and oneand twocardiac cycle occlusions of the artery on the size and the duration of the hyperemic response. After release of 8-second occlusions, flow was p...

Author(s) Page Articles Bojko, Agnieszka 2 Memory Illusions of Pictorial Occlusions Cooper, Lynn M. 9 Question Content and Gender Influence on Depression Screening Scores Falls, Keith 17 Recall and Recognition of Television Commercials As a Function of Serial Position Heath, Timothy L. 23 Correlation Between Tenure and Individualism Hedman, Courtney 30 Physiological and Theoretical Perspectives...

Crural vessel occlusive disease is a common finding in patients presenting with symptomatic chronic critical limb ischemia. This patient group has poor treatment prospects with high morbidity and mortality. Furthermore, infrapopliteal vascular disease is by its very nature technically challenging to deal with by endovascular or surgical techniques. The multilevel distribution of the disease pro...

Elevated plasma homocysteine (hcys) has been associated with a greater risk of heart disease and stroke. A number of studies have suggested that hcys may be a contributing factor to development of various ocular disease. Central retinal vein occlusion (CRVO) is one of the most common vision-threatening retinal vascular diseases, affecting primarily elderly patients. Several studies have demonst...

We describe a new framework, based on boosting algorithms and cascade structures, to efficiently detect objects/faces with occlusions. While our approach is motivated by the work of Viola and Jones, several techniques have been developed for establishing a more general system, including (i) a robust boosting scheme, to select useful weak learners and to avoid overfitting; (ii) reinforcement tra...

The deterministic active appearance model (AAM) tracker fails to track objects under occlusion. In this paper, we discuss two approaches to improve this tracker ’s robustness and tracking results. The first approach initialises the AAM tracker with a shape estimate obtained from an active contour, incorporating shape history into the tracker. The second approach combines AAMs and the particle f...

This paper addresses the recovery of face models from stereo pairs of images in the presence of foreign-body occlusions. In the proposed approach, a 3D morphable model (3DMM) for faces is augmented by an occlusion map defined on the model shape, and occlusion is detected with minimal computational overhead by incorporating robust estimators in the fitting process. Additionally, the method uses ...

Most binocular stereo algorithms assume that all scene elements are visible from both cameras. Scene elements that are visible from only one camera, known as occlusions, pose an important challenge for stereo. Occlusions are important for segmentation, because they appear near discontinuities. However, stereo algorithms tend to ignore occlusions because of their difficulty. One reason is that o...

PurposeFew studies have evaluated real-world performance of radiological AI-tools in clinical practice. Over one-year, we prospectively the use AI software to support detection intracranial large vessel occlusions (LVO) on CT angiography (CTA).MethodQuantitative measures (user log-in attempts, standalone performance) and qualitative data surveys) were reviewed by a key-user group at three timep...