نتایج جستجو برای: shape indices
تعداد نتایج: 271485 فیلتر نتایج به سال:
OBJECT The authors investigated whether quantified shape or size indices could better discriminate between ruptured and unruptured aneurysms. METHODS Several custom algorithms were created to quantifiy the size and shape indices of intracranial aneurysms by using three-dimensional computerized tomography angiography models of the brain vasculature. Data from 27 patients with ruptured or unrup...
Shape indices have been in use for several decades to describe the characteristics and hydrological properties of drainage basins. Due to the fractal behaviour of the basin boundary, perimeter-based shape indices depend on the scale at which they are determined. Therefore, these indices cannot objectively compare drainage basins across a range of scales and basin sizes. This paper presents an o...
BACKGROUND Left ventricular size and shape are important for quantifying cardiac remodeling in response to cardiovascular disease. Geometric remodeling indices have been shown to have prognostic value in predicting adverse events in the clinical literature, but these often describe interrelated shape changes. We developed a novel method for deriving orthogonal remodeling components directly fro...
The identification of fish species using otolith shape has been common in many fields the marine science. Different analytical processes can be applied for morphological discrimination, but reviewing literature we have found conceptual and statistical limitations use indices wavelets (contour analysis), being specially worrying first case due to their widespread routine use. In present study, 4...
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