Occlusion detection is a fundamental and important problem in optical sensor inspection planning. Many viewplanning algorithms have been developed for optical inspection, however, few of them explicitly develop practical algorithms for occlusion detection. This paper presents a hierarchical space partition approach that divides both positional and surface normal space of an object for fast occl...

background: linear and angular measurements such as a point, nasion, b point (anb) angle and wits appraisal index are not accurate enough to evaluate sagittal relationship of the jaws. the aim of this study was to evaluate and compare the range of ì and â angles in 6-17-year-old children of isfahan, having normal occlusion. materials and methods: this was an analytical descriptive study. for th...

Platelet survival time is frequently shortened in patients with coronary artery disease, and it is one of several factors that might contribute to graft occlusion after saphenous vein coronary artery bypass (CAB). In 35 patients with CAB, average platelet survival (autologous labeling with 51Chromium) was shortened in 20 with one or more saphenous vein grafts occluded and normal in 15 with all ...

Acute occlusion of a middle cerebral artery (MCA) reduces cerebral blood flow in normotensive Wistar-Kyoto rats (WKY) and in stroke-prone spontaneously hypertensive rats (SHRSP). The goal of this study was to determine whether MCA occlusion produces a sustained reduction in cerebral blood flow or whether collateral vessels restore blood flow to normal levels. We measured blood flow through cere...

Introduction: The objective of this study was to gather information about normal occlusion and arch dimensions in the primary teeth of the children belonging to an Iranian population. Methods: This descriptive cross-sectional study was performed on 68 children from the city of Mashhad in the 3-5 age range. Dental arch dimensions, interrelationships of primary canine and second molars, overbite ...

statement of problem comprehensive diagnosis is regarded as an important base for orthodontic treatment. an effective way to achieve a correct diagnosis is to compare the craniofacial skeleton of patients with normal cases in the same race through lateral cephalograms. purpose the present study was designed to determine the cephalometric norms of senior high school students in the city of hamed...

one of the signifiant risk factor of ischemic stroke is carotid artery occlusion. although surgical treatment was disappointing in these patient but there is a growing reports of sucessful endovascular treatment recently. in this technical note 56 year-old man who suffered from bilateral carotid occlusion was revascularized. the penumbra thrombosuction system was applied to reduce the risk of d...

In a canine model of reperfused myocardial infarction, we tested the hypothesis that after reperfusion, technetium-99m-hexakis-2-methoxyisobutyl isonitrile (Tc-MIBI) tomographic imaging still reflects occlusion blood flow when the tracer is injected before reperfusion. Nine anesthetized dogs underwent 2 hours of coronary occlusion followed by 3 hours of reperfusion ending by being killed. Refer...