Limitations in Laboratory Stone Analysis: Micro-CT Attenuation Values Alone or FT-IR Alone Can be Unreliable Indicators of Mineral Type
نویسندگان
چکیده
Aims Early reports of micro computed tomography (micro CT) of urinary stones showed non-overlapping ranges of x-ray attenuation values for most minerals. However, extended work in our laboratory has shown that size of stone fragments and scanning parameters can each influence the apparent x-ray attenuation value of minerals. The purpose of the present study was to test the correlation of mineral composition and micro CT attenuation values using small fragments of stone that were presumed to be pure based on results of FT-IR analysis.
منابع مشابه
Nondestructive analysis of urinary calculi using micro computed tomography
BACKGROUND Micro computed tomography (micro CT) has been shown to provide exceptionally high quality imaging of the fine structural detail within urinary calculi. We tested the idea that micro CT might also be used to identify the mineral composition of urinary stones non-destructively. METHODS Micro CT x-ray attenuation values were measured for mineral that was positively identified by infra...
متن کاملمقایسه دو روش طیفسنجی مادونقرمز تبدیل فوریه (FT-IR) و ماوراءبنفش (UV) در اندازهگیری روغنهای معدنی
Background and aims: Mineral oils are petroleum derivatives used in metalworking processes. In recent years, considering the carcinogenicity of less refined mineral oil, two separate threshold limit values considered in recent years. The present study designed to compare the spectrometry methods of Fourier Transform Infrared (FT-IR) and ultraviolet (UV), for analysis of mineral oil. Methods: M...
متن کاملIn Vivo Micro-CT Assessment of Airway Remodeling in a Flexible OVA-Sensitized Murine Model of Asthma
Airway remodeling is a major pathological feature of asthma. Up to now, its quantification still requires invasive methods. In this study, we aimed at determining whether in vivo micro-computed tomography (micro-CT) is able to demonstrate allergen-induced airway remodeling in a flexible mouse model of asthma. Sixty Balb/c mice were challenged intranasally with ovalbumin or saline at 3 different...
متن کاملOptimization of Imaging Parameters in Micro-CT Scanner Based On Signal-To-Noise Ratio for the Analysis of Urinary Stone Composition
Introduction: Micro-CT scanner with a resolution of about 5 micrometers is one of the modalities used to create three-dimensional/two-dimensional images of urinary stones. This study aimed to optimize imaging parameters in micro-computed tomography (CT) scanner based on the signal-to-noise ratio (SNR) of urinary stones for the analysis of stone composition. <stro...
متن کاملOptimizing Design of Stand-alone Hybrid Solar Micro-CHP Systems Using LUS Based Particle Swarm Optimization Algorithm
Utilizing the combined cooling, heating and power generation (CHP) systems to produce cooling, heat and electricity is growing rapidly due to their high efficiency and low emissions in commercial and industrial applications. In conventional CHP systems the deficit of the system power can be purchased from the grid. However, this system cannot be used as the standalone application. The hybrid so...
متن کامل