نتایج جستجو برای: x ray imaging
تعداد نتایج: 1064718 فیلتر نتایج به سال:
X-ray ptychography is a scanning variant of coherent diffractive imaging with the ability to image large fields of view at high resolution. It further allows imaging of non-isolated specimens and can produce quantitative mapping of the electron density distribution in 3D when combined with computed tomography. The method does not require imaging lenses, which makes it dose efficient and suitabl...
Discovered by Wilhelm Roentgen in 1895, X-ray technology is the oldest and most commonly used form of medical imaging and remains an important tool for the diagnosis of many disorders. X-rays are generated when a beam of electrons is accelerated by high voltage and hits a metal probe. The kinetic energy released is transformed into quanta of emitted X-ray radiation. X-rays are absorbed by the m...
Esophageal duplication cyst is a rare congenital foregut anomaly. Making a definite diagnosis is difficult preoperatively, although various imaging techniques can help to localize these lesions and exclude other causes. Here we present a patient who had an esophageal duplication cyst with infection, in which its signs on chest x-ray, computed tomography (CT), and barium swallow examination are ...
X-ray phase-contrast imaging is a promising approach for improving soft-tissue contrast and lowering radiation dose in biomedical applications. While current tabletop imaging systems adapt to common x-ray tubes and large-area detectors by employing absorptive elements such as absorption gratings or monolithic crystals to filter the beam, we developed nanometric phase gratings which enable table...
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