نتایج جستجو برای: tomography scanners x ray computed
تعداد نتایج: 839821 فیلتر نتایج به سال:
isolated third nerve palsy develops in numerous intracranial pathologies such as closed head trauma, tumor, and aneurysm. this report describes a 61 years old female with an abrasion on the left forehead and ptosis of the left eye. initial computed tomography did not reveal any causative cerebral and vascular lesions or orbital and cranial fractures. high-resolution and multi-axial enhanced mag...
Current computed tomography (CT) scanners rotate fast to reduce motion artifact. X-ray tube must work in a high power to make the image clear under short exposure time. However, the life span of such a tube may be shortened. In this paper, we propose a novel double sources CT imaging system, which puts two of the same X-ray sources closely with each other. The system is different from current d...
A straightforward method is presented to estimate peak skin doses (PSDs) delivered by computed tomography (CT) scanners. The measured PSD values are related to the well-known volume CT dose index (CTDI(vol)), displayed on the console of CT scanners. PSD measurement estimates were obtained, in four CT units, by placing radiochromic film on the surface of a CTDI head phantom. Six different X-ray ...
X-ray computed tomography (CT) systems with high resolution (also known as micro-CT systems) have been developed over the last two decades and have been used with great success in small animal studies. A micro-CT scanner is based on the same underlying physical principle as a clinical CT scanner, but it is designed for higher-resolution imaging. It produces three-dimensional (3D) tomographic da...
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introduction: focused assessment with sonography for trauma (fast) is a highly effective first screening tool for initial classification of abdominal trauma patients. the present study was designed to evaluate the outcome of patients with blunt abdominal trauma and positive fast findings. methods: the present prospective cross-sectional study was done on patients over 7 years old with normal ab...
azygos vein aneurysm is a rare cause of a posterior or paratracheal mediastinal mass. trauma or conditions causing elevated flow or pressure in the azygos system, such as cardiac failure or cirrhosis of the liver are secondary causes of aneurysm of the azygos vein. we report a case of asymptomatic saccular aneurysm of the azygos vein in a 45-year-old man with blunt minor chest trauma. the azygos...
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