نتایج جستجو برای: ray radiography
تعداد نتایج: 313003 فیلتر نتایج به سال:
Background and Objective: Chest X-ray is usually the first radiography performed for a newborn. This test is easily accessible and yet a basic screening method. Different results have been reported in various studies regarding the diagnostic value of chest X-ray in cardiovascular disease in children. Materials and Methods: The study was carried out retrospectively using the medical files of 100...
The COVID-19 infection was sparked by the severe acute respiratory syndrome SARS-CoV-2, as mentioned World Health Organization, and originated in Wuhan, Republic of China, eventually extending to every nation worldwide 2020. This research aims establish an efficient Medical Diagnosis Support System (MDSS) for recognizing chest radiography with X-ray data. To build ever more classifier, this MDS...
In recent years new digital x-ray radiographic and fluoroscopic systems based on large-area flat-panel technology have revolutionized our capability of producing x-ray images. However, such imagers are extraordinarily expensive and their rapid image acquisition capability is not required for many applications such as radiography. Here we report a novel approach to achieve a high-quality digital...
Objective(s). The major challenge encountered to decrease the milliamperes (mA) level in X-ray imaging systems is the quantum noise phenomena. This investigation evaluated dose exposure and image resolution of a low dose X-ray imaging (LDXI) prototype comprising a low mA X-ray source and a novel microlens-based sensor relative to current imaging technologies. Study Design. A LDXI in static (gro...
Digital technology has been introduced into radiography very recently but the conventional film based technique will be totally out of the arena in no time as what has happened in the photography field. The state-of-art technology is direct digital Xray imaging based on Flat Panel Detector technology in which the X-ray image is displayed on the computer without the intermediate optics or mechan...
Conventional radiography only provides a measure of the X-ray attenuation caused by an object; thus, it is insensitive to other inherent informative effects, such as refraction. Furthermore, conventional radiographs are degraded by X-ray scatter that can obscure important details of the object being imaged. The novel X-ray technology diffraction-enhanced imaging (DEI) has recently allowed the v...
We report the results of experimental and numerical-simulation studies of shielded radiography using narrowband MeVenergy X-rays from a compact all-laser-driven inverse-Compton-scattering X-ray light source. This recently developed Xray light source is based on a laser-wakefield accelerator with ultra-high-field gradient (GeV/cm). We demonstrate experimentally high-quality radiographic imaging ...
Diffraction enhanced imaging (DEI) is a new, synchrotron-based, x-ray radiography method that uses monochromatic, fan-shaped beams, with an analyser crystal positioned between the subject and the detector. The analyser allows the detection of only those x-rays transmitted by the subject that fall into the acceptance angle (central part of the rocking curve) of the monochromator/analyser system....
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