نتایج جستجو برای: x ray ct
تعداد نتایج: 753974 فیلتر نتایج به سال:
The encapsulation of bismuth as BiOCl/Bi2O3 within ultra-short (ca. 50 nm) single-walled carbon nanocapsules (US-tubes) has been achieved. The Bi@US-tubes have been characterized by high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Bi@US-tubes ha...
Methods Normally the 3D skull data from individual patients can be obtained from CT scanner. However, the overhead expenses and the maintenance costs of a CT machine have deterred many dentists and orthodontists from possessing the machine, so only a few orthodontists use the CT for diagnosis and treatment comparing to the x-ray images that are standard procedures for orthodontic measurements. ...
Most existing X-ray computed tomography (CT) techniques work in single-mounted mode and need to scan the inspected objects one by one. It is time-consuming and not acceptable for the inspection in a large scale. In this paper, we report a multi-mounted CT method and its first engineering implementation. It consists of a multi-mounted scanning geometry and the corresponding algebraic iterative r...
With continuing developments in computed tomography (CT) technology and its increasing use of CT imaging, the ionizing radiation dose from CT is becoming a major public concern particularly for high-dose applications such as cardiac imaging. We recently proposed a novel interior tomography approach for x-ray dose reduction that is very different from all the previously proposed methods. Our met...
تشخیص ساختمان داخلی فرش دستباف با استفاده از تصاویر سیتیاسکن میکروفوکوس حاصل از تبدیل رادون معکوس
In addition to medical recognition applications, X-ray CT-scan images are increasingly found to have more innovative and widespread applications. Due to the ability of producing high resolution and high contrast images from soft tissues with low attenuation coefficients, the usage of X-ray micro-focus source, which has a very small focal point (in the range of micrometer), plays an important ro...
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