Global ETD Search
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Showing 1 to 6 of 6 for “"material decomposition"”.
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Performance Evaluation of Material Decomposition Using Rapid Kvp-Switching Dual-Energy Ct For Assessing Bone Mineral Density
… sets of images representing the densities of two materials in a given basis pair. DECT is theoretically capable of providing a true density measurement of trabecular bone material with the proper material basis pair.</p> <p>Using the rapid kVp-switching GE HD750 scanner, the concentrations of …
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Multi-Material Discrimination Using Photon Counting Spectral Computed Tomography
Quantitative volumetric mapping of multiple materials with spectral computed tomography (CT) has applications in many areas including biomedical imaging, defense and security, geophysical imaging of rock composition and in materials and chemical imaging. Dual or multi-kVp x-ray exposure when using …
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Ammonia emissions and pathogen inactivation during controlled composting of pig manure
… increasing the initial C:N ratio of the organic material. Experimentally, lowering the initial pH significantly reduced ammonia emissions. The effect of the initial C:N ratio on ammonia emissions was not significant because of variations in the pig manure. Pathogen markers were sometimes detected …
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Predicting Compression Failure of Fiber-reinforced Polymer Laminates during Fire
… to predict the thermal response of a decomposing material. The thermal properties were defined as functions of temperature and material decomposition state. The thermal response was used to calculate mechanical properties. The structural model was developed with thermally induced bending caused by …
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Probabilistic Modelling of Sensitivity in Fire Simulations
… design. However, the thermal-physical process of material decomposition in fires and the chemical reactions of fire effluents are not well enough understood to make useful predictions about their burning behaviour. Input parameters are subject to uncertainties which can cause deviations in the …
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Feasibility of Using Virtual Unenhanced Images to Replace Pre-Contrast Images In Multiphase Renal Ct Examinations
<p>Multiphase renal CT exams are a commonly used imaging technique for the diagnosis of renal masses. The pre-contrast, or true unenhanced (TUE), image provides a baseline for enhancement measurements which is an important criteria used to characterize renal lesions, consequently it is crucial that …