نتایج جستجو برای: source ct
تعداد نتایج: 549064 فیلتر نتایج به سال:
Combined PET/CT scanners now play a major role in medicine for in vivo imaging in oncology, cardiology, neurology, and psychiatry. As the performance of a scanner depends not only on the scintillating material but also on the scanner design, with regards to the advent of newer scanners, there is a need to optimize acquisition protocols as well as to compare scanner ...
This study sought to compare the image quality and radiation dose of coronary computed tomography angiography (CCTA) from prospectively triggered 128-slice CT (128-MSCT) versus dual-source 64-slice CT (DSCT). The study was approved by the Medical Ethics Committee at Tongji Medical College of Huazhong University of Science and Technology. Eighty consecutive patients with stable heart rates lower...
BACKGROUND AND PURPOSE The posterior circulation Acute Stroke Prognosis Early CT Score (pc-ASPECTS) quantifies the extent of early ischemic changes in the posterior circulation with a 10-point grading system. We hypothesized that pc-ASPECTS applied to CT angiography source images predicts functional outcome of patients in the Basilar Artery International Cooperation Study (BASICS). METHODS BA...
PURPOSE We aimed to investigate the coronary venous system and its variations by using dual source computed tomography (CT). MATERIALS AND METHODS Retrospective assessment was carried out on 339 patients who underwent coronary CT angiography using 128-slice dual source CT for suspected coronary artery disease. The examinations were performed according to routine imaging protocols used to eval...
امروزه کیفیت توان هم از طرف شبکه و هم از طرف مصرف کنندگان توجه ویژه ای را به خود جلب کرده و این موضوع به خاطر استفاده بسیار گسترده بارهای حساس و تجهیزات الکترونیکی است که ممکن است تحت اختلالاتی نظیر فلیکر ولتاژ، هارمونیک، کمبود و بیشبود ولتاژ و قطعی های موقت قرار بگیرند. این اختلالات موجب عملکرد نامناسب بارهای حساس، گرمای بیش از حد تجهیزات، خرابی موتورهای الکتریکی، اندازه گیری های نادرست و عملک...
introduction: mandibular fracture is the most common facial bone fracture due to facial trauma. a variety of imagings have been used for diagnosis of mandibular fractures. however, the choice of imaging for diagnosis of mandibular fractures is controversial.present study compares the accuracy of the three most common imaging methods in mandibular fracture diagnosis panoramic radiography, corona...
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