نتایج جستجو برای: contrast
تعداد نتایج: 392861 فیلتر نتایج به سال:
purpose : to evaluate distance and near contrast sensitivity (cs) under photopic and mesopic conditions before and after refractive lens exchange (rle) and implantation of the aspheric acrysof restor (sn6ad3 model) intraocular lens (iol) methods : sixty eyes of 30 consecutive patients after rle underwent bilateral implantation with the aspheric acrysof restor iol. the patients sample was divide...
introduction: myelograghy is a process of instilling contrast medium to the subarachnoid space for evaluating the spinal column by radiography. there are various contrast solutions for different radiographic studies but not all of them are suitable for spinal column evaluation. conclusions: our subject recovered completely without any sequelae after receiving appropriate treatment in a multidis...
PURPOSE How do display settings and ambient lighting affect contrast detection thresholds for human observers? Can recalibrating a display for high ambient lighting improve object detection? METHODS Contrast∕detail (CD) threshold detection performance was measured for observers using four color displays with varying overall contrast (e.g., differing maximum luminance and ambient lighting cond...
Introduction: Noninvasive magnetic resonance imaging (MRI) and targeted drug delivery systems, usually referred to as theranostic agents, are being developed to enable detection, site-specific treatment, and long-term monitoring. Materials and Methods: To elucidate the effects of coating on cellular uptake and biodistribution of n...
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